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## 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();
```