YashanDB ADO.NET驱动会对YashanDB数据类型和C#数据类型进行转换，转换关系如下：

• C#映射到YashanDB

  C#数据类型	YasTypes	YashanDB数据类型
  System.Boolean	YacType.YAC_TYPE_BOOL	BOOLEAN
  System.SByte	YacType.YAC_TYPE_TINYINT	TINYINT
  System.Int16	YacType.YAC_TYPE_SMALLINT	SMALLINT
  System.Int32	YacType.YAC_TYPE_INTEGER	INTEGER
  System.Int64	YacType.YAC_TYPE_BIGINT	BIGINT
  System.Byte	YacType.YAC_TYPE_SMALLINT	SMALLINT
  System.UInt16	YacType.YAC_TYPE_USMALLINT	INTEGER
  System.UInt32	YacType.YAC_TYPE_UINTEGER	BIGINT
  System.UInt64	YacType.YAC_TYPE_UBIGINT	NUMBER
  System.Single	YacType.YAC_TYPE_FLOAT	FLOAT
  System.Double	YacType.YAC_TYPE_DOUBLE	DOUBLE
  System.Decimal	YacType.YAC_TYPE_NUMBER	NUMBER
  System.DateTime	YacType.YAC_TYPE_DATE	DATE
  System.Byte[]	YacType.YAC_TYPE_BLOB	BLOB
  System.String	YacType.YAC_TYPE_VARCHAR	VARCHAR
  System.Guid	YacType.YAC_TYPE_CHAR	CHAR

• YashanDB映射到C#

  YashanDB数据类型	YasTypes	C#数据类型
  BOOLEAN	YacType.YAC_TYPE_BOOL	System.Boolean
  TINYINT	YacType.YAC_TYPE_TINYINT	System.SByte
  SMALLINT	YacType.YAC_TYPE_SMALLINT	System.Int16
  INTEGER	YacType.YAC_TYPE_INTEGER	System.Int32
  BIGINT	YacType.YAC_TYPE_BIGINT	System.Int64
  FLOAT	YacType.YAC_TYPE_FLOAT	System.Single
  DOUBLE	YacType.YAC_TYPE_DOUBLE	System.Double
  NUMBER	YacType.YAC_TYPE_NUMBER	System.Decimal
  DATE	YacType.YAC_TYPE_DATE	System.DateTime
  SHORTTIME	YacType.YAC_TYPE_SHORTTIME	System.DateTime
  TIMESTAMP	YacType.YAC_TYPE_TIMESTAMP	System.DateTime
  YM_INTERVAL	YacType.YAC_TYPE_YM_INTERVAL	System.TimeSpan
  DS_INTERVAL	YacType.YAC_TYPE_DS_INTERVAL	System.TimeSpan
  CHAR	YacType.YAC_TYPE_CHAR	System.String
  VARCHAR	YacType.YAC_TYPE_VARCHAR	System.String
  BINARY	YacType.YAC_TYPE_BINARY	System.Byte[]
  CLOB	YacType.YAC_TYPE_CLOB	System.Byte[]
  BLOB	YacType.YAC_TYPE_BLOB	System.Byte[]