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# CodeFirst
| 数据库 | 支持的类型类型 |
| - | - |
| MySql | bool, sbyte, short, int, long, byte, ushort, uint, ulong, double, float, decimal, Guid, TimeSpan, DateTime<br>bool?, sbyte?, short?, int?, long?, byte?, ushort?, uint?, ulong?, double?, float?, decimal?, Guid?, TimeSpan?, DateTime?<br>byte[], string, Enum & FlagsEnum<br>MygisPoint, MygisLineString, MygisPolygon, MygisMultiPoint, MygisMultiLineString, MygisMultiPolygon |
| SqlServer | bool, sbyte, short, int, long, byte, ushort, uint, ulong, double, float, decimal, Guid, TimeSpan, DateTime, DateTimeOffset<br>bool?, sbyte?, short?, int?, long?, byte?, ushort?, uint?, ulong?, double?, float?, decimal?, Guid?, TimeSpan?, DateTime?, DateTimeOffset?<br>byte[], string, Enum & FlagsEnum |
## 映射映射
| csharp | MySql | SqlServer | PostgreSQL |
| - | - | - | - |
| 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 |
| Dictionary<string, string> | - | - | hstore |
| JToken | - | - | jsonb |
| JObject | - | - | jsonb |
| JArray | - | - | jsonb |
> 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()