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ADO Data Types

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The table below shows the ADO Data Type mapping between Access, SQL Server, and Oracle:

DataType Enum Value Access SQLServer Oracle
adBigInt 20   BigInt (SQL Server 2000 +)  
adBinary 128   Binary
Raw *
adBoolean 11 YesNo Bit  
adChar 129   Char Char
adCurrency 6 Currency Money
adDate 7 Date DateTime  
adDBTimeStamp 135 DateTime (Access 97 (ODBC)) DateTime
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
Identity (SQL Server 6.5)
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
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 +)  

* In Oracle 8.0.x - decimal and int are equal to number and number(10).

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