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ADO DataTypes
The table below shows the ADO Data Type mapping between Access, SQL Server, and Oracle:
下边列举了在Access、SQL Server和Oracle之间映射的ADO的数据类型：
| 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 +) |
* In Oracle 8.0.x - decimal and int are equal to number and number(10).
*在Oracle 8.0.x中，小数[decimal]和整数[int]number和number(10)相同。
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