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这适用于SQL Server 2005。SQL Server 2008，SQL Server 2008 R2，SQL Server 2012和SQL Server 2014的表的更新版本。SQL Server数据类型及其.NET Framework等价物下表列出了Microsoft SQL Server数据类型，它们在System.Data.SqlTypes命名空间中SQL Server的公共语言运行时（CLR）中的等效项，以及Microsoft .NET Framework中它们的本机CLR等效项。SQL Server data type CLR data type (SQL Server) CLR data type (.NET Framework) varbinary SqlBytes, SqlBinary Byte[] binary SqlBytes, SqlBinary Byte[] varbinary(1), binary(1) SqlBytes, SqlBinary byte, Byte[] image None Nonevarchar None Nonechar None Nonenvarchar(1), nchar(1) SqlChars, SqlString Char, String, Char[] nvarchar SqlChars, SqlString String, Char[] nchar SqlChars, SqlString String, Char[] text None Nonentext None Noneuniqueidentifier SqlGuid Guid rowversion None Byte[] bit SqlBoolean Boolean tinyint SqlByte Byte smallint SqlInt16 Int16 int SqlInt32 Int32 bigint SqlInt64 Int64 smallmoney SqlMoney Decimal money SqlMoney Decimal numeric SqlDecimal Decimal decimal SqlDecimal Decimal real SqlSingle Single float SqlDouble Double smalldatetime SqlDateTime DateTime datetime SqlDateTime DateTime sql_variant None Object User-defined type(UDT) None user-defined type table None None cursor None Nonetimestamp None None xml SqlXml None