(转)C# 数据类型映射 (SQLite,MySQL,MSSQL,Oracle)
一、C# vs SQLite: C#SQLite 字段名类型库类型GetFieldType(#)转换备注 F_BOOLboolBIT NOT NULLBoolean F_BOOL_NULLbool?BITBoolean F_SBYTEsbyteINT8 NOT NULLSBytesbyte_ F_SBYTE_NULLsbyte?INT8SBytesbyte_ F_BYTEbyteUINT8 NOT NULLByte F_BYTE_NULLbyte
一、C# vs SQLite:
C# SQLite
字段名 类型 库类型 GetFieldType(#) 转换 备注
F_BOOL bool BIT NOT NULL Boolean
F_BOOL_NULL bool? BIT Boolean
F_SBYTE sbyte INT8 NOT NULL SByte sbyte_
F_SBYTE_NULL sbyte? INT8 SByte sbyte_
F_BYTE byte UINT8 NOT NULL Byte
F_BYTE_NULL byte? UINT8 Byte
F_SHORT short INT16 NOT NULL Int16
F_SHORT_NULL short? INT16 Int16
F_USHORT ushort UINT16 NOT NULL UInt16 ushort_
F_USHORT_NULL ushort? UINT16 UInt16 ushort_
F_INT int INT32 NOT NULL Int32
F_INT_NULL int? INT32 Int32
F_UINT uint UINT32 NOT NULL UInt32 uint_
F_UINT_NULL uint? UINT32 UInt32 uint_
F_LONG long INT64 NOT NULL Int64
F_LONG_NULL long? INT64 Int64
F_ULONG ulong UINT64 NOT NULL UInt64 ulong_
F_ULONG_NULL ulong? UINT64 UInt64 ulong_
F_FLOAT float FLOAT NOT NULL Double 不转兼容
F_FLOAT_NULL float? FLOAT Double 不转兼容
F_DOUBLE double DOUBLE NOT NULL Double
F_DOUBLE_NULL double? DOUBLE Double
F_DECIMAL
decimal
DECIMAL NOT NULL
Decimal
存取不一:
F_DECIMAL_NULL
decimal?
DECIMAL
Decimal
存取不一:
F_CHAR char TEXT NOT NULL String
F_CHAR_NULL char? TEXT String
F_STRING string TEXT NOT NULL String
F_STRING_NULL string TEXT String
F_DATETIME DateTime TEXT NOT NULL String
F_DATETIME_NULL DateTime? TEXT String
二、 C# vs MySQL:
C# MySQL
字段名 类型 库类型 GetFieldType(#) 转换 备注
F_BOOL bool BOOL NOT NULL Boolean
F_BOOL_NULL bool? BOOL NULL Boolean
F_SBYTE sbyte TINYINT NOT NULL SByte sbyte_
F_SBYTE_NULL sbyte? TINYINT NULL SByte sbyte_
F_BYTE byte TINYINT UNSIGNED NOT NULL Byte
F_BYTE_NULL byte? TINYINT UNSIGNED NULL Byte
F_SHORT short SMALLINT NOT NULL Int16
F_SHORT_NULL short? SMALLINT NULL Int16
F_USHORT ushort SMALLINT UNSIGNED NOT NULL UInt16 ushort_
F_USHORT_NULL ushort? SMALLINT UNSIGNED NULL UInt16 ushort_
F_INT int INT NOT NULL Int32
F_INT_NULL int? INT NULL Int32
F_UINT uint INT UNSIGNED NOT NULL UInt32 uint_
F_UINT_NULL uint? INT UNSIGNED NULL UInt32 uint_
F_LONG long BIGINT NOT NULL Int64
F_LONG_NULL long? BIGINT NULL Int64
F_ULONG ulong BIGINT UNSIGNED NOT NULL UInt64 ulong_
F_ULONG_NULL ulong? BIGINT UNSIGNED NULL UInt64 ulong_
F_FLOAT float FLOAT NOT NULL Single 极值溢出
F_FLOAT_NULL float? FLOAT NULL Single 极值溢出
F_DOUBLE double DOUBLE NOT NULL Double
F_DOUBLE_NULL double? DOUBLE NULL Double
F_DECIMAL decimal DECIMAL NOT NULL Decimal 极值溢出
F_DECIMAL_NULL decimal? DECIMAL NULL Decimal 极值溢出
F_CHAR char CHARACTER NOT NULL String 中文报错
F_CHAR_NULL char? CHARACTER NULL String 中文报错
F_STRING string VARCHAR(50) NOT NULL String
F_STRING_NULL string VARCHAR(50) NULL String
F_DATETIME DateTime DATETIME NOT NULL DateTime
F_DATETIME_NULL DateTime? DATETIME NULL DateTime
三、 C# vs MSSQL:
C# MSSQL
字段名 类型 库类型 GetFieldType(#) 转换 备注
F_BOOL bool bit NOT NULL Boolean
F_BOOL_NULL bool? bit NULL Boolean
F_SBYTE sbyte smallint NOT NULL Int16 sbyte_short
F_SBYTE_NULL sbyte? smallint NULL Int16 sbyte_short
F_BYTE byte tinyint NOT NUL; Byte
F_BYTE_NULL byte? tinyint NULL Byte
F_SHORT short smallint NOT NULL Int16
F_SHORT_NULL short? smallint NULL Int16
F_USHORT ushort int NOT NULL Int32 ushort_int
F_USHORT_NULL ushort? int NULL Int32 ushort_int
F_INT int int NOT NULL Int32
F_INT_NULL int? int NULL Int32
F_UINT uint bigint NOT NULL Int64 uint_long
F_UINT_NULL uint? bigint NULL Int64 uint_long
F_LONG long bigint NOT NULL Int64
F_LONG_NULL long? bigint NULL Int64
F_ULONG ulong real NOT NULL Single ulong_float
F_ULONG_NULL ulong? real NULL Single ulong_float
F_FLOAT float real NOT NULL Single
F_FLOAT_NULL float? real NULL Single
F_DOUBLE double float NOT NULL Double
F_DOUBLE_NULL double? float NULL Double
F_DECIMAL decimal decimal NOT NULL Decimal 极值溢出
F_DECIMAL_NULL decimal? decimal NULL Decimal 极值溢出
F_CHAR char char(1) NOT NULL String
F_CHAR_NULL char? char(1) NULL String
F_STRING string varchar(50) NOT NULL F_STRING:
F_STRING_NULL string varchar(50) NULL String
F_DATETIME DateTime datetime NOT NULL DateTime
F_DATETIME_NULL DateTime? datetime NULL DateTime
四、C# vs Oracle:
C# Oracle
字段名 类型 库类型 GetFieldType(#) 转换 备注
F_BOOL bool CHAR(1) NOT NULL String bool_string
F_BOOL_NULL bool? CHAR(1) String bool_string
F_SBYTE sbyte NUMBER(3) NOT NULL Int16 sbyte_short
F_SBYTE_NULL sbyte? NUMBER(3) Int16 sbyte_short
F_BYTE byte NUMBER(3) NOT NULL Int16 byte_short
F_BYTE_NULL byte? NUMBER(3) Int16 byte_short
F_SHORT short NUMBER(5) NOT NULL Int32 short_int
F_SHORT_NULL short? NUMBER(5) Int32 short_int
F_USHORT ushort NUMBER(5) NOT NULL Int32 ushort_int
F_USHORT_NULL ushort? NUMBER(5) Int32 ushort_int
F_INT int NUMBER(10) NOT NULL Int64 int_long
F_INT_NULL int? NUMBER(10) Int64 int_long
F_UINT uint NUMBER(10) NOT NULL Int64 uint_long
F_UINT_NULL uint? NUMBER(10) Int64 uint_long
F_LONG long NUMBER(19) NOT NULL Decimal long_decimal
F_LONG_NULL long? NUMBER(19) Decimal long_decimal
F_ULONG ulong NUMBER(19) NOT NULL Decimal ulong_decimal
F_ULONG_NULL ulong? NUMBER(19) Decimal ulong_decimal
F_FLOAT float BINARY_FLOAT NOT NULL Single
F_FLOAT_NULL float? BINARY_FLOAT Single
F_DOUBLE double BINARY_DOUBLE NOT NULL Double 极值溢出
F_DOUBLE_NULL double? BINARY_DOUBLE Double 极值溢出
F_DECIMAL decimal DECIMAL(33,3) NOT NULL Decimal
F_DECIMAL_NULL decimal? DECIMAL(33,3) Decimal
F_CHAR char CHAR(1) NOT NULL String
F_CHAR_NULL char? CHAR(1) String
F_STRING string VARCHAR(50) NOT NULL String 不允许空字符
F_STRING_NULL string VARCHAR(50) String 不允许空字符
F_DATETIME DateTime TIMESTAMP NOT NULL DateTime 大值读取报错
F_DATETIME_NULL DateTime? TIMESTAMP DateTime 大值读取报
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