diff --git a/Docs/codefirst.md b/Docs/codefirst.md
index 35a5dbef..809adc34 100644
--- a/Docs/codefirst.md
+++ b/Docs/codefirst.md
@@ -2,68 +2,77 @@
 
 ## 类型映射
 
-| csharp | MySql | SqlServer | PostgreSQL |
+| csharp | MySql | SqlServer | PostgreSQL | oracle |
 | - | - | - | - |
-| bool \| bool? | bit(1) | bit | bool |
-| sbyte \| sbyte? | tinyint(3) | smallint | int2 |
-| short \| short? | smallint(6) | smallint | int2 |
-| int \| int? | int(11) | int | int4 |
-| long \| long? | bigint(20) | bigint | int8 |
-| byte \| byte? | tinyint(3) unsigned | tinyint | int2 |
-| ushort \| ushort? | smallint(5) unsigned | int | int4 |
-| uint \| uint? | int(10) unsigned | bigint | int8 |
-| ulong \| ulong? | bigint(20) unsigned | decimal(20,0) | numeric(20,0) |
-| double \| double? | double | float | float8 |
-| float \| float? | float | real | float4 |
-| decimal \| decimal? | decimal(10,2) | decimal(10,2) | numeric(10,2) |
-| Guid \| Guid? | char(36) | uniqueidentifier | uuid |
-| TimeSpan \| TimeSpan? | time | time | time |
-| DateTime \| DateTime? | datetime | datetime | timestamp |
-| DateTimeOffset \| DateTimeOffset? | - | - | datetimeoffset |
-| Enum \| Enum? | enum | int | int4 |
-| FlagsEnum \| FlagsEnum? | set | bigint | int8 |
-| byte[] | varbinary(255) | varbinary(255) | bytea |
-| string | varchar(255) | nvarchar(255) | varchar(255) |
-| MygisPoint | point | - | - |
-| MygisLineString | linestring | - | - |
-| MygisPolygon | polygon | - | - |
-| MygisMultiPoint | multipoint | - | - |
-| MygisMultiLineString | multilinestring | - | - |
-| MygisMultiPolygon | multipolygon | - | - |
-| BitArray | - | - | varbit(64) |
-| NpgsqlPoint \| NpgsqlPoint? | - | - | point |
-| NpgsqlLine \| NpgsqlLine? | - | - | line |
-| NpgsqlLSeg \| NpgsqlLSeg? | - | - | lseg |
-| NpgsqlBox \| NpgsqlBox? | - | - | box |
-| NpgsqlPath \| NpgsqlPath? | - | - | path |
-| NpgsqlPolygon \| NpgsqlPolygon? | - | - | polygon |
-| NpgsqlCircle \| NpgsqlCircle? | - | - | circle |
-| (IPAddress Address, int Subnet) \| (IPAddress Address, int Subnet)? | - | - | cidr |
-| IPAddress | - | - | inet |
-| PhysicalAddress | - | - | macaddr |
-| NpgsqlRange\<int\> \| NpgsqlRange\<int\>? | - | - | int4range |
-| NpgsqlRange\<long\> \| NpgsqlRange\<long\>? | - | - | int8range |
-| NpgsqlRange\<decimal\> \| NpgsqlRange\<decimal\>? | - | - | numrange |
-| NpgsqlRange\<DateTime\> \| NpgsqlRange\<DateTime\>? | - | - | tsrange |
-| PostgisPoint | - | - | geometry |
-| PostgisLineString | - | - | geometry |
-| PostgisPolygon | - | - | geometry |
-| PostgisMultiPoint | - | - | geometry |
-| PostgisMultiLineString | - | - | geometry |
-| PostgisMultiPolygon | - | - | geometry |
-| PostgisGeometry | - | - | geometry |
-| PostgisGeometryCollection | - | - | geometry |
-| Dictionary<string, string> | - | - | hstore |
-| JToken | - | - | jsonb |
-| JObject | - | - | jsonb |
-| JArray | - | - | jsonb |
-| 数组 | - | - | 以上所有类型都支持 |
+| bool \| bool? | bit(1) | bit | bool | number(1) |
+| sbyte \| sbyte? | tinyint(3) | smallint | int2 | number(4) |
+| short \| short? | smallint(6) | smallint | int2 | number(6) |
+| int \| int? | int(11) | int | int4 | number(11) |
+| long \| long? | bigint(20) | bigint | int8 | number(21) |
+| byte \| byte? | tinyint(3) unsigned | tinyint | int2 | number(3) |
+| ushort \| ushort? | smallint(5) unsigned | int | int4 | number(5) |
+| uint \| uint? | int(10) unsigned | bigint | int8 | number(10) |
+| ulong \| ulong? | bigint(20) unsigned | decimal(20,0) | numeric(20,0) | number(20) |
+| double \| double? | double | float | float8 | float(126) |
+| float \| float? | float | real | float4 | float(63) |
+| decimal \| decimal? | decimal(10,2) | decimal(10,2) | numeric(10,2) | number(10,2) |
+| Guid \| Guid? | char(36) | uniqueidentifier | uuid | char(36 CHAR) |
+| TimeSpan \| TimeSpan? | time | time | time | interval day(2) to second(6) |
+| DateTime \| DateTime? | datetime | datetime | timestamp | timestamp(6) |
+| DateTimeOffset \| DateTimeOffset? | - | - | datetimeoffset | timestamp(6) with local time zone |
+| Enum \| Enum? | enum | int | int4 | number(16) |
+| FlagsEnum \| FlagsEnum? | set | bigint | int8 | number(32) |
+| byte[] | varbinary(255) | varbinary(255) | bytea | blob |
+| string | varchar(255) | nvarchar(255) | varchar(255) | nvarchar2(255) |
+| MygisPoint | point | - | - | - |
+| MygisLineString | linestring | - | - | - |
+| MygisPolygon | polygon | - | - | - |
+| MygisMultiPoint | multipoint | - | - | - |
+| MygisMultiLineString | multilinestring | - | - | - |
+| MygisMultiPolygon | multipolygon | - | - | - |
+| BitArray | - | - | varbit(64) | - |
+| NpgsqlPoint \| NpgsqlPoint? | - | - | point | - |
+| NpgsqlLine \| NpgsqlLine? | - | - | line | - |
+| NpgsqlLSeg \| NpgsqlLSeg? | - | - | lseg | - |
+| NpgsqlBox \| NpgsqlBox? | - | - | box | - |
+| NpgsqlPath \| NpgsqlPath? | - | - | path | - |
+| NpgsqlPolygon \| NpgsqlPolygon? | - | - | polygon | - |
+| NpgsqlCircle \| NpgsqlCircle? | - | - | circle | - |
+| (IPAddress Address, int Subnet) \| (IPAddress Address, int Subnet)? | - | - | cidr | - |
+| IPAddress | - | - | inet | - |
+| PhysicalAddress | - | - | macaddr | - |
+| NpgsqlRange\<int\> \| NpgsqlRange\<int\>? | - | - | int4range | - |
+| NpgsqlRange\<long\> \| NpgsqlRange\<long\>? | - | - | int8range | - |
+| NpgsqlRange\<decimal\> \| NpgsqlRange\<decimal\>? | - | - | numrange | - |
+| NpgsqlRange\<DateTime\> \| NpgsqlRange\<DateTime\>? | - | - | tsrange | - |
+| PostgisPoint | - | - | geometry | - |
+| PostgisLineString | - | - | geometry | - |
+| PostgisPolygon | - | - | geometry | - |
+| PostgisMultiPoint | - | - | geometry | - |
+| PostgisMultiLineString | - | - | geometry | - |
+| PostgisMultiPolygon | - | - | geometry | - |
+| PostgisGeometry | - | - | geometry | - |
+| PostgisGeometryCollection | - | - | geometry | - |
+| Dictionary<string, string> | - | - | hstore | - |
+| JToken | - | - | jsonb | - |
+| JObject | - | - | jsonb | - |
+| JArray | - | - | jsonb | - |
+| 数组 | - | - | 以上所有类型都支持 | - |
 
 > 以上类型和长度是默认值，可手工设置，如 string 属性可指定 [Column(DbType = "varchar(max)")]
 
 ```csharp
 IFreeSql fsql = new FreeSql.FreeSqlBuilder()
     .UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10")
+    .UseAutoSyncStructure(true)
+
+    .UseMonitorCommand(
+        cmd => {
+            Console.WriteLine(cmd.CommandText);
+        }, //监听SQL命令对象，在执行前
+        (cmd, traceLog) => {
+            Console.WriteLine(traceLog);
+        }) //监听SQL命令对象，在执行后
     .Build();
 ```
 
diff --git a/Docs/expression.md b/Docs/expression.md
index fc23cd04..a57179c7 100644
--- a/Docs/expression.md
+++ b/Docs/expression.md
@@ -1,177 +1,177 @@
 # 表达式函数
-| 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle | 功能说明 |
 | - | - | - | - | - |
-| a ? b : c | case when athen b else c end | case when athen b else c end | case when athen b else c end | a成立时取b值，否则取c值 |
-| a ?? b | ifnull(a, b) | isnull(a, b) | coalesce(a, b) | 当a为null时，取b值 |
-| 数字 + 数字 | a + b | a + b | a + b | 数字相加 |
-| 数字 + 字符串 | concat(a, b) | cast(a as varchar) + cast(b as varchar) | case(a as varchar)\|\| b | 字符串相加，a或b任意一个为字符串时 |
-| a - b | a - b | a - b | a - b | 减
-| a * b | a * b | a * b | a * b | 乘
-| a / b | a / b | a / b | a / b | 乘
-| a % b | a % b | a % b | a % b | 模
+| a ? b : c | case when a then b else c end | case when a then b else c end | case when a then b else c end | case when a then b else c end | a成立时取b值，否则取c值 |
+| a ?? b | ifnull(a, b) | isnull(a, b) | coalesce(a, b) | nvl(a, b) | 当a为null时，取b值 |
+| 数字 + 数字 | a + b | a + b | a + b | a + b | 数字相加 |
+| 数字 + 字符串 | concat(a, b) | cast(a as varchar) + cast(b as varchar) | case(a as varchar)\|\| b | a\|\| b | 字符串相加，a或b任意一个为字符串时 |
+| a - b | a - b | a - b | a - b | a - b | 减
+| a * b | a * b | a * b | a * b | a * b | 乘
+| a / b | a / b | a / b | a / b | a / b | 除
+| a % b | a % b | a % b | a % b | mod(a,b) | 模
 
 > 等等...
 
 ### 数组
-| 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle | 功能说明 |
 | - | - | - | - | - |
-| a.Length | - | - | case when a is null then 0 else array_length(a,1) end | 数组长度 |
-| 常量数组.Length | - | - | array_length(array[常量数组元素逗号分割],1) | 数组长度 |
-| a.Any() | - | - | case when a is null then 0 else array_length(a,1) end > 0 | 数组是否为空 |
-| 常量数组.Contains(b) | b in (常量数组元素逗号分割) | b in (常量数组元素逗号分割) | b in (常量数组元素逗号分割) | IN查询 |
-| a.Contains(b) | - | - | a @> array[b] | a数组是否包含b元素 |
-| a.Concat(b) | - | - | a \|\| b | 数组相连 |
-| a.Count() | - | - | 同 Length | 数组长度 |
+| a.Length | - | - | case when a is null then 0 else array_length(a,1) end | - | 数组长度 |
+| 常量数组.Length | - | - | array_length(array[常量数组元素逗号分割],1) | - | 数组长度 |
+| a.Any() | - | - | case when a is null then 0 else array_length(a,1) end > 0 | - | 数组是否为空 |
+| 常量数组.Contains(b) | b in (常量数组元素逗号分割) | b in (常量数组元素逗号分割) | b in (常量数组元素逗号分割) | b in (常量数组元素逗号分割) | IN查询 |
+| a.Contains(b) | - | - | a @> array[b] | - | a数组是否包含b元素 |
+| a.Concat(b) | - | - | a \|\| b | - | 数组相连 |
+| a.Count() | - | - | 同 Length | - | 数组长度 |
 
 ### 字典 Dictionary<string, string>
-| 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle | 功能说明 |
 | - | - | - | - | - |
-| a.Count | - | - | case when a is null then 0 else array_length(akeys(a),1) end | 字典长度 |
-| a.Keys | - | - | akeys(a) | 返回字典所有key数组 |
-| a.Values | - | - | avals(a) | 返回字典所有value数组 |
-| a.Contains(b) | - | - | a @> b | 字典是否包含b
-| a.ContainsKey(b) | - | - | a? b | 字典是否包含key
-| a.Concat(b) | - | - | a \|\| b | 字典相连 |
-| a.Count() | - | - | 同 Count | 字典长度 |
+| a.Count | - | - | case when a is null then 0 else array_length(akeys(a),1) end | - | 字典长度 |
+| a.Keys | - | - | akeys(a) | - | 返回字典所有key数组 |
+| a.Values | - | - | avals(a) | - | 返回字典所有value数组 |
+| a.Contains(b) | - | - | a @> b | - | 字典是否包含b
+| a.ContainsKey(b) | - | - | a? b | - | 字典是否包含key
+| a.Concat(b) | - | - | a \|\| b | - | 字典相连 |
+| a.Count() | - | - | 同 Count | - | 字典长度 |
 
 ### JSON JToken/JObject/JArray
-| 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle | 功能说明 |
 | - | - | - | - | - |
-| a.Count | - | - | jsonb_array_length(coalesce(a, '[])) | json数组类型的长度 |
-| a.Any() | - | - | jsonb_array_length(coalesce(a, '[])) > 0 | json数组类型，是否为空 |
-| a.Contains(b) | - | - | coalesce(a, '{}') @> b::jsonb | json中是否包含b |
-| a.ContainsKey(b) | - | - | coalesce(a, '{}') ? b | json中是否包含键b |
-| a.Concat(b) | - | - | coalesce(a, '{}') || b::jsonb | 连接两个json |
-| Parse(a) | - | - | a::jsonb | 转化字符串为json类型 |
+| a.Count | - | - | jsonb_array_length(coalesce(a, '[])) | - | json数组类型的长度 |
+| a.Any() | - | - | jsonb_array_length(coalesce(a, '[])) > 0 | - | json数组类型，是否为空 |
+| a.Contains(b) | - | - | coalesce(a, '{}') @> b::jsonb | - | json中是否包含b |
+| a.ContainsKey(b) | - | - | coalesce(a, '{}') ? b | - | json中是否包含键b |
+| a.Concat(b) | - | - | coalesce(a, '{}') || b::jsonb | - | 连接两个json |
+| Parse(a) | - | - | a::jsonb | - | 转化字符串为json类型 |
 
 ### 字符串对象
-| 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle | 功能说明 |
 | - | - | - | - | - |
 | string.Empty | '' | '' | '' | 空字符串表示 |
-| string.IsNullOrEmpty(a) | (a is null or a = '') | (a is null or a = '') | (a is null or a = '') | 空字符串表示 |
-| a.CompareTo(b) | strcmp(a, b) | - | case when a = b then 0 when a > b then 1 else -1 end | 比较a和b大小 |
-| a.Contains('b') | a like '%b%' | a like '%b%' | a ilike'%b%' | a是否包含b |
-| a.EndsWith('b') | a like '%b' | a like '%b' | a ilike'%b' | a尾部是否包含b |
-| a.IndexOf(b) | locate(a, b) - 1 | locate(a, b) - 1 | strpos(a, b) - 1 | 查找a中出现b的位置 |
-| a.Length | char_length(a) | len(a) | char_length(a) | 返回a的字符串长度 |
-| a.PadLeft(b, c) | lpad(a, b, c) | - | lpad(a, b, c) | 在a的左侧充字符c，直到字符串长度大于b |
-| a.PadRight(b, c) | rpad(a, b, c) | - | rpad(a, b, c) | 在a的右侧充字符c，直到字符串长度大于b |
-| a.Replace(b, c) | replace(a, b, c) | replace(a, b, c) | replace(a, b, c) | 将a中字符串b，替换成c |
-| a.StartsWith('b') | a like 'b%' | a like 'b%' | a ilike'b%' | a头部是否包含b |
-| a.Substring(b, c) | substr(a, b, c + 1) | substring(a, b, c + 1) | substr(a, b, c + 1) | 截取a中位置b到c的内容 |
-| a.ToLower | lower(a) | lower(a) | lower(a) | 转小写 |
-| a.ToUpper | upper(a) | upper(a) | upper(a) | 转大写 |
-| a.Trim | trim(a) | trim(a) | trim(a) | 移除两边字符 |
-| a.TrimEnd | rtrim(a) | rtrim(a) | rtrim(a) | 移除左侧指定字符 |
-| a.TrimStart | ltrim(a) | ltrim(a) | ltrim(a) | 移除右侧指定字符 |
+| string.IsNullOrEmpty(a) | (a is null or a = '') | (a is null or a = '') | (a is null or a = '') | (a is null or a = '') | 空字符串表示 |
+| a.CompareTo(b) | strcmp(a, b) | - | case when a = b then 0 when a > b then 1 else -1 end | case when a = b then 0 when a > b then 1 else -1 end | 比较a和b大小 |
+| a.Contains('b') | a like '%b%' | a like '%b%' | a ilike'%b%' | a like '%b%' | a是否包含b |
+| a.EndsWith('b') | a like '%b' | a like '%b' | a ilike'%b' | a like '%b' | a尾部是否包含b |
+| a.IndexOf(b) | locate(a, b) - 1 | locate(a, b) - 1 | strpos(a, b) - 1 | instr(a, b, 1, 1) - 1 | 查找a中出现b的位置 |
+| a.Length | char_length(a) | len(a) | char_length(a) | length(a) | 返回a的字符串长度 |
+| a.PadLeft(b, c) | lpad(a, b, c) | - | lpad(a, b, c) | lpad(a, b, c) | 在a的左侧充字符c，直到字符串长度大于b |
+| a.PadRight(b, c) | rpad(a, b, c) | - | rpad(a, b, c) | rpad(a, b, c) | 在a的右侧充字符c，直到字符串长度大于b |
+| a.Replace(b, c) | replace(a, b, c) | replace(a, b, c) | replace(a, b, c) | replace(a, b, c) | 将a中字符串b，替换成c |
+| a.StartsWith('b') | a like 'b%' | a like 'b%' | a ilike'b%' | a like 'b%' | a头部是否包含b |
+| a.Substring(b, c) | substr(a, b, c + 1) | substring(a, b, c + 1) | substr(a, b, c + 1) | substr(a, b, c + 1) | 截取a中位置b到c的内容 |
+| a.ToLower | lower(a) | lower(a) | lower(a) | lower(a) | 转小写 |
+| a.ToUpper | upper(a) | upper(a) | upper(a) | upper(a) | 转大写 |
+| a.Trim | trim(a) | trim(a) | trim(a) | trim(a) | 移除两边字符 |
+| a.TrimEnd | rtrim(a) | rtrim(a) | rtrim(a) | rtrim(a) | 移除左侧指定字符 |
+| a.TrimStart | ltrim(a) | ltrim(a) | ltrim(a) | ltrim(a) | 移除右侧指定字符 |
 
 ### 日期对象
-| 表达式 | MySql | SqlServer | PostgreSQL |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle |
 | - | - | - | - |
-| DateTime.Now | now() | getdate() | current_timestamp |
-| DateTime.UtcNow | utc_timestamp() | getutcdate() | (current_timestamp at time zone 'UTC') |
-| DateTime.Today | curdate | convert(char(10),getdate(),120) | current_date |
-| DateTime.MaxValue | cast('9999/12/31 23:59:59' as datetime) | '1753/1/1 0:00:00' | '0001/1/1 0:00:00'::timestamp |
-| DateTime.MinValue | cast('0001/1/1 0:00:00' as datetime) | '9999/12/31 23:59:59' | '9999/12/31 23:59:59'::timestamp |
-| DateTime.Compare(a, b) | a - b | a - b | extract(epoch from a::timestamp-b::timestamp) |
-| DateTime.DaysInMonth(a, b) | dayofmonth(last_day(concat(a, '-', b, '-1'))) | datepart(day, dateadd(day, -1, dateadd(month, 1, cast(a as varchar) + '-' + cast(b as varchar) + '-1'))) | extract(day from (a || '-' || b || '-01')::timestamp+'1 month'::interval-'1 day'::interval) |
-| DateTime.Equals(a, b) | a = b | a = b | a = b |
-| DateTime.IsLeapYear(a) | a%4=0 and a%100<>0 or a%400=0 | a%4=0 and a%100<>0 or a%400=0 | a%4=0 and a%100<>0 or a%400=0 |
-| DateTime.Parse(a) | cast(a as datetime) | cast(a as datetime) | a::timestamp |
-| a.Add(b) | date_add(a, interval b microsecond) | dateadd(millisecond, b / 1000, a) | a::timestamp+(b||' microseconds')::interval | 增加TimeSpan值 |
-| a.AddDays(b) | date_add(a, interval b day) | dateadd(day, b, a) | a::timestamp+(b||' day')::interval |
-| a.AddHours(b) | date_add(a, interval b hour) | dateadd(hour, b, a) | a::timestamp+(b||' hour')::interval |
-| a.AddMilliseconds(b) | date_add(a, interval b*1000 microsecond) | dateadd(millisecond, b, a) | a::timestamp+(b||' milliseconds')::interval |
-| a.AddMinutes(b) | date_add(a, interval b minute) | dateadd(minute, b, a) | a::timestamp+(b||' minute')::interval |
-| a.AddMonths(b) | date_add(a, interval b month) | dateadd(month, b, a) | a::timestamp+(b||' month')::interval |
-| a.AddSeconds(b) | date_add(a, interval b second) | dateadd(second, b, a) | a::timestamp+(b||' second')::interval |
-| a.AddTicks(b) | date_add(a, interval b/10 microsecond) | dateadd(millisecond, b / 10000, a) | a::timestamp+(b||' microseconds')::interval |
-| a.AddYears(b) | date_add(a, interval b year) | dateadd(year, b, a) | a::timestamp+(b||' year')::interval |
-| a.Date | cast(date_format(a, '%Y-%m-%d') as datetime) | convert(char(10),a,120) | a::date |
-| a.Day | dayofmonth(a) | datepart(day, a) | extract(day from a::timestamp) |
-| a.DayOfWeek | dayofweek(a) | datepart(weekday, a) - 1 | extract(dow from a::timestamp) |
-| a.DayOfYear | dayofyear(a) | datepart(dayofyear, a) | extract(doy from a::timestamp) |
-| a.Hour | hour(a) | datepart(hour, a) | extract(hour from a::timestamp) |
-| a.Millisecond | floor(microsecond(a) / 1000) | datepart(millisecond, a) | extract(milliseconds from a::timestamp)-extract(second from a::timestamp)*1000 |
-| a.Minute | minute(a) | datepart(minute, a) | extract(minute from a::timestamp) |
-| a.Month | month(a) | datepart(month, a) | extract(month from a::timestamp) |
-| a.Second | second(a) | datepart(second, a) | extract(second from a::timestamp) |
-| a.Subtract(b) | timestampdiff(microsecond, b, a) | datediff(millisecond, b, a) * 1000 | (extract(epoch from a::timestamp-b::timestamp)*1000000) |
-| a.Ticks | timestampdiff(microsecond, '0001-1-1', a) * 10 | datediff(millisecond, '1970-1-1', a) * 10000 + 621355968000000000 | extract(epoch from a::timestamp)*10000000+621355968000000000 |
-| a.TimeOfDay | timestampdiff(microsecond, date_format(a, '%Y-%m-%d'), a) | '1970-1-1 ' + convert(varchar, a, 14) | extract(epoch from a::time)*1000000 |
-| a.Year | year(a) | datepart(year, a) | extract(year from a::timestamp) | 年 |
-| a.Equals(b) | a = b | a = b | a = b |
-| a.CompareTo(b) | a - b | a - b | a - b |
-| a.ToString() | date_format(a, '%Y-%m-%d %H:%i:%s.%f') | convert(varchar, a, 121) | to_char(a, 'YYYY-MM-DD HH24:MI:SS.US') |
+| DateTime.Now | now() | getdate() | current_timestamp | systimestamp |
+| DateTime.UtcNow | utc_timestamp() | getutcdate() | (current_timestamp at time zone 'UTC') | sys_extract_utc(systimestamp) |
+| DateTime.Today | curdate | convert(char(10),getdate(),120) | current_date | trunc(systimestamp) |
+| DateTime.MaxValue | cast('9999/12/31 23:59:59' as datetime) | '9999/12/31 23:59:59' | '9999/12/31 23:59:59'::timestamp | to_timestamp('9999-12-31 23:59:59','YYYY-MM-DD HH24:MI:SS.FF6') |
+| DateTime.MinValue | cast('0001/1/1 0:00:00' as datetime) | '1753/1/1 0:00:00' | '0001/1/1 0:00:00'::timestamp | to_timestamp('0001-01-01 00:00:00','YYYY-MM-DD HH24:MI:SS.FF6') |
+| DateTime.Compare(a, b) | a - b | a - b | extract(epoch from a::timestamp-b::timestamp) | extract(day from (a-b)) |
+| DateTime.DaysInMonth(a, b) | dayofmonth(last_day(concat(a, '-', b, '-1'))) | datepart(day, dateadd(day, -1, dateadd(month, 1, cast(a as varchar) + '-' + cast(b as varchar) + '-1'))) | extract(day from (a || '-' || b || '-01')::timestamp+'1 month'::interval-'1 day'::interval) | cast(to_char(last_day(a||'-'||b||'-01'),'DD') as number) |
+| DateTime.Equals(a, b) | a = b | a = b | a = b | a = b |
+| DateTime.IsLeapYear(a) | a%4=0 and a%100<>0 or a%400=0 | a%4=0 and a%100<>0 or a%400=0 | a%4=0 and a%100<>0 or a%400=0 | mod(a,4)=0 AND mod(a,100)<>0 OR mod(a,400)=0 |
+| DateTime.Parse(a) | cast(a as datetime) | cast(a as datetime) | a::timestamp | to_timestamp(a,'YYYY-MM-DD HH24:MI:SS.FF6') |
+| a.Add(b) | date_add(a, interval b microsecond) | dateadd(millisecond, b / 1000, a) | a::timestamp+(b||' microseconds')::interval | 增加TimeSpan值 | a + b |
+| a.AddDays(b) | date_add(a, interval b day) | dateadd(day, b, a) | a::timestamp+(b||' day')::interval | a + b |
+| a.AddHours(b) | date_add(a, interval b hour) | dateadd(hour, b, a) | a::timestamp+(b||' hour')::interval | a + b/24 |
+| a.AddMilliseconds(b) | date_add(a, interval b*1000 microsecond) | dateadd(millisecond, b, a) | a::timestamp+(b||' milliseconds')::interval | a + b/86400000 |
+| a.AddMinutes(b) | date_add(a, interval b minute) | dateadd(minute, b, a) | a::timestamp+(b||' minute')::interval | a + b/1440 |
+| a.AddMonths(b) | date_add(a, interval b month) | dateadd(month, b, a) | a::timestamp+(b||' month')::interval | add_months(a,b) |
+| a.AddSeconds(b) | date_add(a, interval b second) | dateadd(second, b, a) | a::timestamp+(b||' second')::interval | a + b/86400 |
+| a.AddTicks(b) | date_add(a, interval b/10 microsecond) | dateadd(millisecond, b / 10000, a) | a::timestamp+(b||' microseconds')::interval | a + b/86400000000 |
+| a.AddYears(b) | date_add(a, interval b year) | dateadd(year, b, a) | a::timestamp+(b||' year')::interval | add_months(a,b*12) |
+| a.Date | cast(date_format(a, '%Y-%m-%d') as datetime) | convert(char(10),a,120) | a::date | trunc(a) |
+| a.Day | dayofmonth(a) | datepart(day, a) | extract(day from a::timestamp) | cast(to_char(a,'DD') as number) |
+| a.DayOfWeek | dayofweek(a) | datepart(weekday, a) - 1 | extract(dow from a::timestamp) | case when to_char(a)='7' then 0 else cast(to_char(a) as number) end |
+| a.DayOfYear | dayofyear(a) | datepart(dayofyear, a) | extract(doy from a::timestamp) | cast(to_char(a,'DDD') as number) |
+| a.Hour | hour(a) | datepart(hour, a) | extract(hour from a::timestamp) | cast(to_char(a,'HH24') as number) |
+| a.Millisecond | floor(microsecond(a) / 1000) | datepart(millisecond, a) | extract(milliseconds from a::timestamp)-extract(second from a::timestamp)*1000 | cast(to_char(a,'FF3') as number) |
+| a.Minute | minute(a) | datepart(minute, a) | extract(minute from a::timestamp) | cast(to_char(a,'MI') as number) |
+| a.Month | month(a) | datepart(month, a) | extract(month from a::timestamp) | cast(to_char(a,'FF3') as number) |
+| a.Second | second(a) | datepart(second, a) | extract(second from a::timestamp) | cast(to_char(a,'SS') as number) |
+| a.Subtract(b) | timestampdiff(microsecond, b, a) | datediff(millisecond, b, a) * 1000 | (extract(epoch from a::timestamp-b::timestamp)*1000000) | a - b |
+| a.Ticks | timestampdiff(microsecond, '0001-1-1', a) * 10 | datediff(millisecond, '1970-1-1', a) * 10000 + 621355968000000000 | extract(epoch from a::timestamp)*10000000+621355968000000000 | cast(to_char(a,'FF7') as number) |
+| a.TimeOfDay | timestampdiff(microsecond, date_format(a, '%Y-%m-%d'), a) | '1970-1-1 ' + convert(varchar, a, 14) | extract(epoch from a::time)*1000000 | a - trunc(a) |
+| a.Year | year(a) | datepart(year, a) | extract(year from a::timestamp) | 年 | cast(to_char(a,'YYYY') as number) |
+| a.Equals(b) | a = b | a = b | a = b | a = b |
+| a.CompareTo(b) | a - b | a - b | a - b | a - b |
+| a.ToString() | date_format(a, '%Y-%m-%d %H:%i:%s.%f') | convert(varchar, a, 121) | to_char(a, 'YYYY-MM-DD HH24:MI:SS.US') | to_char(a,'YYYY-MM-DD HH24:MI:SS.FF6') |
 
 ### 时间对象
-| 表达式 | MySql(微秒) | SqlServer(秒) | PostgreSQL(微秒) |
+| 表达式 | MySql(微秒) | SqlServer(秒) | PostgreSQL(微秒) | Oracle(Interval day(9) to second(7)) |
 | - | - | - | - |
-| TimeSpan.Zero | 0 | 0 | - | 0微秒 |
-| TimeSpan.MaxValue | 922337203685477580 | 922337203685477580 | - |
-| TimeSpan.MinValue | -922337203685477580 | -922337203685477580 | - |
-| TimeSpan.Compare(a, b) | a - b | a - b | - |
-| TimeSpan.Equals(a, b) | a = b | a = b | - |
-| TimeSpan.FromDays(a) | a * 1000000 * 60 * 60 * 24 | a * 1000000 * 60 * 60 * 24 | - |
-| TimeSpan.FromHours(a) | a * 1000000 * 60 * 60 | a * 1000000 * 60 * 60 | - |
-| TimeSpan.FromMilliseconds(a) | a * 1000 | a * 1000 | - |
-| TimeSpan.FromMinutes(a) | a * 1000000 * 60 | a * 1000000 * 60 | - |
-| TimeSpan.FromSeconds(a) | a * 1000000 | a * 1000000 | - |
-| TimeSpan.FromTicks(a) | a / 10 | a / 10 | - |
-| a.Add(b) | a + b | a + b | - |
-| a.Subtract(b) | a - b | a - b | - |
-| a.CompareTo(b) | a - b | a - b | - |
-| a.Days | a div (1000000 * 60 * 60 * 24) | a div (1000000 * 60 * 60 * 24) | - |
-| a.Hours | a div (1000000 * 60 * 60) mod 24 | a div (1000000 * 60 * 60) mod 24 | - |
-| a.Milliseconds | a div 1000 mod 1000 | a div 1000 mod 1000 | - |
-| a.Seconds | a div 1000000 mod 60 | a div 1000000 mod 60 | - |
-| a.Ticks | a * 10 | a * 10 | - |
-| a.TotalDays | a / (1000000 * 60 * 60 * 24) | a / (1000000 * 60 * 60 * 24) | - |
-| a.TotalHours | a / (1000000 * 60 * 60) | a / (1000000 * 60 * 60) | - |
-| a.TotalMilliseconds | a / 1000 | a / 1000 | - |
-| a.TotalMinutes | a / (1000000 * 60) | a / (1000000 * 60) | - |
-| a.TotalSeconds | a / 1000000 | a / 1000000 | - |
-| a.Equals(b) | a = b | a = b | - |
-| a.ToString() | cast(a as varchar) | cast(a as varchar) | - |
+| TimeSpan.Zero | 0 | 0 | - | 0微秒 | numtodsinterval(0,'second') |
+| TimeSpan.MaxValue | 922337203685477580 | 922337203685477580 | - | numtodsinterval(233720368.5477580,'second') |
+| TimeSpan.MinValue | -922337203685477580 | -922337203685477580 | - | numtodsinterval(-233720368.5477580,'second') |
+| TimeSpan.Compare(a, b) | a - b | a - b | - | extract(day from (a-b)) |
+| TimeSpan.Equals(a, b) | a = b | a = b | - | a = b |
+| TimeSpan.FromDays(a) | a * 1000000 * 60 * 60 * 24 | a * 1000000 * 60 * 60 * 24 | - | numtodsinterval(a*86400,'second') |
+| TimeSpan.FromHours(a) | a * 1000000 * 60 * 60 | a * 1000000 * 60 * 60 | - | numtodsinterval(a*3600,'second') |
+| TimeSpan.FromMilliseconds(a) | a * 1000 | a * 1000 | - | numtodsinterval(a/1000,'second') |
+| TimeSpan.FromMinutes(a) | a * 1000000 * 60 | a * 1000000 * 60 | - | numtodsinterval(a*60,'second') |
+| TimeSpan.FromSeconds(a) | a * 1000000 | a * 1000000 | - | numtodsinterval(a,'second') |
+| TimeSpan.FromTicks(a) | a / 10 | a / 10 | - | numtodsinterval(a/10000000,'second') |
+| a.Add(b) | a + b | a + b | - | a + b |
+| a.Subtract(b) | a - b | a - b | - | a - b |
+| a.CompareTo(b) | a - b | a - b | - | extract(day from (a-b)) |
+| a.Days | a div (1000000 * 60 * 60 * 24) | a div (1000000 * 60 * 60 * 24) | - | extract(day from a) |
+| a.Hours | a div (1000000 * 60 * 60) mod 24 | a div (1000000 * 60 * 60) mod 24 | - | extract(hour from a) |
+| a.Milliseconds | a div 1000 mod 1000 | a div 1000 mod 1000 | - | cast(substr(extract(second from a)-floor(extract(second from a)),2,3) as number) |
+| a.Seconds | a div 1000000 mod 60 | a div 1000000 mod 60 | - | extract(second from a) |
+| a.Ticks | a * 10 | a * 10 | - | (extract(day from a)*86400+extract(hour from a)*3600+extract(minute from a)*60+extract(second from a))*10000000 |
+| a.TotalDays | a / (1000000 * 60 * 60 * 24) | a / (1000000 * 60 * 60 * 24) | - | extract(day from a) |
+| a.TotalHours | a / (1000000 * 60 * 60) | a / (1000000 * 60 * 60) | - | (extract(day from a)*24+extract(hour from a)) |
+| a.TotalMilliseconds | a / 1000 | a / 1000 | - | (extract(day from a)*86400+extract(hour from a)*3600+extract(minute from a)*60+extract(second from a))*1000 |
+| a.TotalMinutes | a / (1000000 * 60) | a / (1000000 * 60) | - | | (extract(day from a)*1440+extract(hour from a)*60+extract(minute from a)) |
+| a.TotalSeconds | a / 1000000 | a / 1000000 | - | (extract(day from a)*86400+extract(hour from a)*3600+extract(minute from a)*60+extract(second from a)) |
+| a.Equals(b) | a = b | a = b | - | a = b |
+| a.ToString() | cast(a as varchar) | cast(a as varchar) | - | to_char(a) |
 
 ### 数学函数
 | 表达式 | MySql | SqlServer | PostgreSQL |
 | - | - | - | - |
 | Math.Abs(a) | abs(a) | abs(a) | abs(a) |
-| Math.Acos(a) | acos(a) | acos(a) | acos(a) |
-| Math.Asin(a) | asin(a) | asin(a) | asin(a) |
-| Math.Atan(a) | atan(a) | atan(a) | (atan(a)) |
-| Math.Atan2(a, b) | atan2(a, b) | atan2(a, b) | atan2(a, b) |
-| Math.Ceiling(a) | ceiling(a) | ceiling(a) | ceiling(a) |
-| Math.Cos(a) | cos(a) | cos(a) | cos(a) |
-| Math.Exp(a) | exp(a) | exp(a) | exp(a) |
-| Math.Floor(a) | floor(a) | floor(a) | floor(a) |
-| Math.Log(a) | log(a) | log(a) | log(a) |
-| Math.Log10(a) | log10(a) | log10(a) | log10(a) |
-| Math.PI(a) | 3.1415926535897931 | 3.1415926535897931 | 3.1415926535897931 |
-| Math.Pow(a, b) | pow(a, b) | power(a, b) | pow(a, b) |
-| Math.Round(a, b) | round(a, b) | round(a, b) | round(a, b) |
-| Math.Sign(a) | sign(a) | sign(a) | sign(a) |
-| Math.Sin(a) | sin(a) | sin(a) | sin(a) |
-| Math.Sqrt(a) | sqrt(a) | sqrt(a) | sqrt(a) |
-| Math.Tan(a) | tan(a) | tan(a) | tan(a) |
-| Math.Truncate(a) | truncate(a, 0) | floor(a) | trunc(a, 0) |
+| Math.Acos(a) | acos(a) | acos(a) | acos(a) | acos(a) |
+| Math.Asin(a) | asin(a) | asin(a) | asin(a) | asin(a) |
+| Math.Atan(a) | atan(a) | atan(a) | atan(a) | atan(a) |
+| Math.Atan2(a, b) | atan2(a, b) | atan2(a, b) | atan2(a, b) | - |
+| Math.Ceiling(a) | ceiling(a) | ceiling(a) | ceiling(a) | ceil(a) |
+| Math.Cos(a) | cos(a) | cos(a) | cos(a) | cos(a) |
+| Math.Exp(a) | exp(a) | exp(a) | exp(a) | exp(a) |
+| Math.Floor(a) | floor(a) | floor(a) | floor(a) | floor(a) |
+| Math.Log(a) | log(a) | log(a) | log(a) | log(e,a) |
+| Math.Log10(a) | log10(a) | log10(a) | log10(a) | log(10,a) |
+| Math.PI(a) | 3.1415926535897931 | 3.1415926535897931 | 3.1415926535897931 | 3.1415926535897931 |
+| Math.Pow(a, b) | pow(a, b) | power(a, b) | pow(a, b) | power(a, b) |
+| Math.Round(a, b) | round(a, b) | round(a, b) | round(a, b) | round(a, b) |
+| Math.Sign(a) | sign(a) | sign(a) | sign(a) | sign(a) |
+| Math.Sin(a) | sin(a) | sin(a) | sin(a) | sin(a) |
+| Math.Sqrt(a) | sqrt(a) | sqrt(a) | sqrt(a) | sqrt(a) |
+| Math.Tan(a) | tan(a) | tan(a) | tan(a) | tan(a) |
+| Math.Truncate(a) | truncate(a, 0) | floor(a) | trunc(a, 0) | trunc(a, 0) |
 
 ### 类型转换
-| 表达式 | MySql | SqlServer | PostgreSQL |
+| 表达式 | MySql | SqlServer | PostgreSQL | Oracle |
 | - | - | - | - |
-| Convert.ToBoolean(a) | a not in ('0','false') | a not in ('0','false') | a::varchar not in ('0','false','f','no') |
-| Convert.ToByte(a) | cast(a as unsigned) | cast(a as tinyint) | a::int2 |
-| Convert.ToChar(a) | substr(cast(a as char),1,1) | substring(cast(a as nvarchar),1,1) | substr(a::char,1,1) |
-| Convert.ToDateTime(a) | cast(a as datetime) | cast(a as datetime) | a::timestamp |
-| Convert.ToDecimal(a) | cast(a as decimal(36,18)) | cast(a as decimal(36,19)) | a::numeric |
-| Convert.ToDouble(a) | cast(a as decimal(32,16)) | cast(a as decimal(32,16)) | a::float8 |
-| Convert.ToInt16(a) | cast(a as signed) | cast(a as smallint) | a::int2 |
-| Convert.ToInt32(a) | cast(a as signed) | cast(a as int) | a::int4 |
-| Convert.ToInt64(a) | cast(a as signed) | cast(a as bigint) | a::int8 |
-| Convert.ToSByte(a) | cast(a as signed) | cast(a as tinyint) | a::int2 |
-| Convert.ToString(a) | cast(a as decimal(14,7)) | cast(a as decimal(14,7)) | a::float4 |
-| Convert.ToSingle(a) | cast(a as char) | cast(a as nvarchar) | a::varchar |
-| Convert.ToUInt16(a) | cast(a as unsigned) | cast(a as smallint) | a::int2 |
-| Convert.ToUInt32(a) | cast(a as unsigned) | cast(a as int) | a::int4 |
-| Convert.ToUInt64(a) | cast(a as unsigned) | cast(a as bigint) | a::int8 |
+| Convert.ToBoolean(a) | a not in ('0','false') | a not in ('0','false') | a::varchar not in ('0','false','f','no') | - |
+| Convert.ToByte(a) | cast(a as unsigned) | cast(a as tinyint) | a::int2 | cast(a as number) |
+| Convert.ToChar(a) | substr(cast(a as char),1,1) | substring(cast(a as nvarchar),1,1) | substr(a::char,1,1) | substr(to_char(a),1,1) |
+| Convert.ToDateTime(a) | cast(a as datetime) | cast(a as datetime) | a::timestamp | to_timestamp(a,'YYYY-MM-DD HH24:MI:SS.FF6') |
+| Convert.ToDecimal(a) | cast(a as decimal(36,18)) | cast(a as decimal(36,19)) | a::numeric | cast(a as number) |
+| Convert.ToDouble(a) | cast(a as decimal(32,16)) | cast(a as decimal(32,16)) | a::float8 | cast(a as number) |
+| Convert.ToInt16(a) | cast(a as signed) | cast(a as smallint) | a::int2 | cast(a as number) |
+| Convert.ToInt32(a) | cast(a as signed) | cast(a as int) | a::int4 | cast(a as number) |
+| Convert.ToInt64(a) | cast(a as signed) | cast(a as bigint) | a::int8 | cast(a as number) |
+| Convert.ToSByte(a) | cast(a as signed) | cast(a as tinyint) | a::int2 | cast(a as number) |
+| Convert.ToString(a) | cast(a as decimal(14,7)) | cast(a as decimal(14,7)) | a::float4 | to_char(a) |
+| Convert.ToSingle(a) | cast(a as char) | cast(a as nvarchar) | a::varchar | cast(a as number) |
+| Convert.ToUInt16(a) | cast(a as unsigned) | cast(a as smallint) | a::int2 | cast(a as number) |
+| Convert.ToUInt32(a) | cast(a as unsigned) | cast(a as int) | a::int4 | cast(a as number) |
+| Convert.ToUInt64(a) | cast(a as unsigned) | cast(a as bigint) | a::int8 | cast(a as number) |
diff --git a/Docs/generator.md b/Docs/generator.md
index c95c10a5..7900967a 100644
--- a/Docs/generator.md
+++ b/Docs/generator.md
@@ -14,8 +14,17 @@
 
 ```csharp
 //定义 mysql FreeSql
-var mysql = new FreeSql.FreeSqlBuilder()
+IFreeSql fsql = new FreeSql.FreeSqlBuilder()
     .UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10")
+    .UseAutoSyncStructure(true)
+
+    .UseMonitorCommand(
+        cmd => {
+            Console.WriteLine(cmd.CommandText);
+        }, //监听SQL命令对象，在执行前
+        (cmd, traceLog) => {
+            Console.WriteLine(traceLog);
+        }) //监听SQL命令对象，在执行后
     .Build();
 
 //创建模板生成类现实
diff --git a/FreeSql.Tests/Oracle/OracleExpression/StringTest.cs b/FreeSql.Tests/Oracle/OracleExpression/StringTest.cs
index dcf38e8e..3d74e272 100644
--- a/FreeSql.Tests/Oracle/OracleExpression/StringTest.cs
+++ b/FreeSql.Tests/Oracle/OracleExpression/StringTest.cs
@@ -631,45 +631,45 @@ namespace FreeSql.Tests.OracleExpression {
 		}
 		[Fact]
 		public void CompareTo() {
-			//var data = new List<object>();
-			//data.Add(select.Where(a => a.Title.CompareTo(a.Title) == 0).ToList());
-			//data.Add(select.Where(a => a.Title.CompareTo(a.Title) > 0).ToList());
-			//data.Add(select.Where(a => a.Title.CompareTo(a.Title + 1) == 0).ToList());
-			//data.Add(select.Where(a => a.Title.CompareTo(a.Title + a.Type.Name) == 0).ToList());
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(a.`Title`, a.`Title`) = 0);
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.CompareTo(a.Title) == 0).ToList());
+			data.Add(select.Where(a => a.Title.CompareTo(a.Title) > 0).ToList());
+			data.Add(select.Where(a => a.Title.CompareTo(a.Title + 1) == 0).ToList());
+			data.Add(select.Where(a => a.Title.CompareTo(a.Title + a.Type.Name) == 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(a.`Title`, a.`Title`) = 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(a.`Title`, a.`Title`) > 0);
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(a.`Title`, a.`Title`) > 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(a.`Title`, concat(a.`Title`, 1)) = 0);
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(a.`Title`, concat(a.`Title`, 1)) = 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
-			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
-			////WHERE (strcmp(a.`Title`, concat(a.`Title`, a__Type.`Name`)) = 0);
-			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo("aaa") == 0).ToList());
-			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title) > 0).ToList());
-			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title + 1) == 0).ToList());
-			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Type.Name) == 0).ToList());
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(concat(a.`Title`, 'aaa'), 'aaa') = 0);
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (strcmp(a.`Title`, concat(a.`Title`, a__Type.`Name`)) = 0);
+			data.Add(select.Where(a => (a.Title + "aaa").CompareTo("aaa") == 0).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title) > 0).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title + 1) == 0).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Type.Name) == 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(concat(a.`Title`, 'aaa'), 'aaa') = 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(concat(a.`Title`, 'aaa'), a.`Title`) > 0);
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(concat(a.`Title`, 'aaa'), a.`Title`) > 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
-			////FROM `tb_topic` a 
-			////WHERE (strcmp(concat(a.`Title`, 'aaa'), concat(a.`Title`, 1)) = 0);
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (strcmp(concat(a.`Title`, 'aaa'), concat(a.`Title`, 1)) = 0);
 
-			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
-			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
-			////WHERE (strcmp(concat(a.`Title`, 'aaa'), a__Type.`Name`) = 0)
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (strcmp(concat(a.`Title`, 'aaa'), a__Type.`Name`) = 0)
 		}
 
 		[Fact]
diff --git a/FreeSql.sln b/FreeSql.sln
index bccd550b..e5f23de0 100644
--- a/FreeSql.sln
+++ b/FreeSql.sln
@@ -9,9 +9,13 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FreeSql.Tests", "FreeSql.Te
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Docs", "Docs", "{C6A74E2A-6660-473D-8852-B1D8348DB4E9}"
 	ProjectSection(SolutionItems) = preProject
+		Docs\1. quickstart.md = Docs\1. quickstart.md
+		Docs\2 入门.md = Docs\2 入门.md
+		Docs\2.1 安装FreeSql = Docs\2.1 安装FreeSql
 		Docs\codefirst.md = Docs\codefirst.md
 		Docs\dbfirst.md = Docs\dbfirst.md
 		Docs\delete.md = Docs\delete.md
+		Docs\expression.md = Docs\expression.md
 		Docs\generator.md = Docs\generator.md
 		Docs\insert.md = Docs\insert.md
 		readme.md = readme.md
diff --git a/FreeSql/Oracle/OracleExpression.cs b/FreeSql/Oracle/OracleExpression.cs
index ca799019..a7a48fc9 100644
--- a/FreeSql/Oracle/OracleExpression.cs
+++ b/FreeSql/Oracle/OracleExpression.cs
@@ -183,7 +183,7 @@ namespace FreeSql.Oracle {
 						}
 						return left;
 					case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
-					//case "CompareTo": return $"strcmp({left}, {getExp(exp.Arguments[0])})";
+					case "CompareTo": return $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end";
 					case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
 				}
 			}
@@ -245,7 +245,7 @@ namespace FreeSql.Oracle {
 					case "AddMonths": return $"add_months({left},{args1})";
 					case "AddSeconds": return $"({left}+({args1})/86400)";
 					case "AddTicks": return $"({left}+({args1})/864000000000)";
-					case "AddYears": return $"add_months({left},12)";
+					case "AddYears": return $"add_months({left},({args1})*12)";
 					case "Subtract":
 						if (exp.Arguments[0].Type.FullName == "System.DateTime" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime")
 							return $"({args1}-{left})";
diff --git a/readme.md b/readme.md
index de17a413..1c2eec82 100644
--- a/readme.md
+++ b/readme.md
@@ -4,7 +4,7 @@ FreeSql 是轻量化、可扩展和跨平台版的 .NETStandard 数据访问技
 
 FreeSql 可用作对象关系映射程序 (O/RM)，以便于开发人员能够使用 .NETStandard 对象来处理数据库，不必经常编写大部分数据访问代码。
 
-FreeSql 支持 MySql/SqlServer/PostgreSQL 数据库技术实现。
+FreeSql 支持 MySql/SqlServer/PostgreSQL/Oracle 数据库技术实现。
 
 FreeSql 打造 .NETCore 最方便的 ORM，dbfirst codefirst混合使用，codefirst模式下的开发阶段，建好实体不用执行任何操作即能创建表和修改字段，dbfirst模式下提供api+模板自定义生成代码，作者提供了3种模板,您可以持续关注或者参与给出宝贵意见，QQ群：4336577。