来自:
http://support.microsoft.com/default.aspx?scid=kb%3Bzh-cn%3B214854
ODBC 与 Jet 数据类型映射
ODBC SQL Type Precision Scale Jet 3.5 Type Jet 40 Type
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SQL_BIT N/A N/A Boolean Boolean
SQL_TINYINT N/A N/A Byte* Byte*
SQL_TINYINT N/A N/A Integer* Integer*
SQL_SMALLINT N/A N/A Integer Integer
SQL_INTEGER N/A N/A Long Long
SQL_REAL N/A N/A Single Single
SQL_FLOAT N/A N/A Double Double
SQL_DOUBLE N/A N/A Double Double
SQL_DECIMAL 0 To 4 0 Integer Decimal
SQL_DECIMAL 5 To 9 0 Long Decimal
SQL_DECIMAL 10 to 15 0 Double Decimal
SQL_DECIMAL <=15 >0 Double Decimal
SQL_DECIMAL 16 To 28 N/A Text Decimal
SQL_DECIMAL > 28 N/A Text Text
SQL_NUMERIC 0 To 4 0 Integer Decimal
SQL_NUMERIC 5 To 9 0 Long Decimal
SQL_NUMERIC 10 to 15 0 Double Decimal
SQL_NUMERIC <=15 >0 Double Decimal
SQL_NUMERIC 16 To 28 N/A Text Decimal
SQL_NUMERIC > 28 N/A Text Text
SQL_CHAR <= 255 N/A Text Text
SQL_CHAR > 255 N/A Memo Memo
SQL_VARCHAR <= 255 N/A Text Text
SQL_VARCHAR > 255 N/A Memo Memo
SQL_LONGVARCHAR N/A N/A Memo Memo
SQL_WCHAR <= 255 N/A Unsupported Text
SQL_WCHAR > 255 N/A Unsupported Memo
SQL_WVARCHAR <= 255 N/A Unsupported Text
SQL_WVARCHAR > 255 N/A Unsupported Memo
SQL_WLONGVARCHAR N/A N/A Unsupported Memo
SQL_DATE N/A N/A DateTime DateTime
SQL_TIME N/A N/A DateTime DateTime
SQL_TIMESTAMP N/A N/A DateTime DateTime
SQL_BINARY <=255 N/A Binary Binary
SQL_BINARY 256 To 510 N/A LongBinary Binary
SQL_BINARY > 510 N/A LongBinary LongBinary
SQL_VARBINARY <=255 N/A Binary Binary
SQL_VARBINARY 256 To 510 N/A LongBinary Binary
SQL_VARBINARY > 510 N/A LongBinary LongBinary
SQL_LONGVARBINARY N/A N/A LongBinary LongBinary
SQL_GUID N/A N/A Text Guid
* An unsigned SQL_TINYINT maps to a Jet Byte, a signed SQL_TINYINT
maps to an Jet Integer.
特殊 ODBC 到 Jet - 数据类型映射为 SQLServer
MicrosoftJet 是与 Microsoft SQL Server ODBC 驱动程序, 如果发生下列其他数据类型映射：
ODBC SQL Type Precision Scale Jet 3.5 Type Jet 40 Type
-----------------------------------------------------------
SQL_DECIMAL 10 4 Currency Currency
SQL_DECIMAL 19 4 Currency Currency
SQL_NUMERIC 10 4 Currency Currency
SQL_NUMERIC 19 4 Currency Currency