ADO 数据类型

下面的表格列出了 Access、SQL Server 与 Oracle 之间的数据类型映射：

DataType Enum Value Access SQLServer Oracle
adBigInt 20 BigInt (SQL Server 2000 +)
adBinary 128 Binary TimeStamp Raw
adBoolean 11 YesNo Bit
adChar 129 Char Char
adCurrency 6 Currency Money SmallMoney
adDate 7 Date DateTime
adDBTimeStamp 135 DateTime (Access 97 (ODBC)) DateTime SmallDateTime Date
adDecimal 14 Decimal
adDouble 5 Double Float Float
adGUID 72 ReplicationID (Access 97 (OLEDB)), (Access 2000 (OLEDB)) UniqueIdentifier (SQL Server 7.0 +)
adIDispatch 9
adInteger 3 AutoNumber Integer Long Identity (SQL Server 6.5) Int Int
adLongVarBinary 205 OLEObject Image Long Raw Blob (Oracle 8.1.x)
adLongVarChar 201 Memo (Access 97) Hyperlink (Access 97) Text Long * Clob (Oracle 8.1.x)
adLongVarWChar 203 Memo (Access 2000 (OLEDB)) Hyperlink (Access 2000 (OLEDB)) NText (SQL Server 7.0 +) NClob (Oracle 8.1.x)
adNumeric 131 Decimal (Access 2000 (OLEDB)) Decimal Numeric Decimal Integer Number SmallInt
adSingle 4 Single Real
adSmallInt 2 Integer SmallInt
adUnsignedTinyInt 17 Byte TinyInt
adVarBinary 204 ReplicationID (Access 97) VarBinary
adVarChar 200 Text (Access 97) VarChar VarChar
adVariant 12 Sql_Variant (SQL Server 2000 +) VarChar2
adVarWChar 202 Text (Access 2000 (OLEDB)) NVarChar (SQL Server 7.0 +) NVarChar2
adWChar 130 NChar (SQL Server 7.0 +)
  • 在 Oracle 8.0.x 中 - decimal 和 int 等于 number 和 number(10)。