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
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 +)  

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