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List of the Most Common Data Type Mappings

2004-07-12 11:34 537 查看

http://support.microsoft.com/default.aspx?scid=kb;en-us;320435
The following table lists the most common data types that are used in Microsoft Access and how these data types relate to the Microsoft .NET Framework data types and to the OleDbType enumeration.

Access Type Name	Database Data Type	OLE DB Type	.NET Framework Type	Member Name
Text	VarWChar	DBTYPE_WSTR	System.String	OleDbType.VarWChar
Memo	LongVarWChar	DBTYPE_WSTR	System.String	OleDbType.LongVarWChar
Number: Byte	UnsignedTinyInt	DBTYPE_UI1	System.Byte	OleDbType.UnsignedTinyInt
Yes/No	Boolean	DBTYPE_BOOL	System.Boolean	OleDbType.Boolean
Date/Time	DateTime	DBTYPE_DATE	System.DateTime	OleDbType.Date
Currency	Decimal	DBTYPE_NUMERIC	System.Decimal	OleDbType.Numeric
Number: Decimal	Decimal	DBTYPE_NUMERIC	System.Decimal	OleDbType.Numeric
Number: Double	Double	DBTYPE_R8	System.Double	OleDbType.Double
Autonumber (Replication ID)	GUID	DBTYPE_GUID	System.Guid	OleDbType.Guid
Number: (Replication ID)	GUID	DBTYPE_GUID	System.Guid	OleDbType.Guid
Autonumber (Long Integer)	Integer	DBTYPE_I4	System.Int32	OleDbType.Integer
Number: (Long Integer)	Integer	DBTYPE_I4	System.Int32	OleDbType.Integer
OLE Object	LongVarBinary	DBTYPE_BYTES	Array of System.Byte	OleDbType.LongVarBinary
Number: Single	Single	DBTYPE_R4	System.Single	OleDbType.Single
Number: Integer	SmallInt	DBTYPE_I2	System.Int16	OleDbType.SmallInt
Binary	VarBinary*	DBTYPE_BYTES	Array of System.Byte	OleDbType.Binary
Hyperlink	VarWChar	DBTYPE_WSTR	System.String	OleDbType.VarWChar

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