Data Type Conversion

A Data Type Conversion

The gateway converts SQL Server data types to Oracle data types as follows:

Table A-1 Data Type Mapping and Restrictions

SQL Server	Oracle	Comment	If Oracle uses large varchar (32k)
`BIGINT`	`NUMBER(20)`
`BIGINT` `IDENTITY`	`NUMBER(20)`
`BINARY`	`RAW`	-
`BIT`	`NUMBER(3)`	-
`CHAR`	`CHAR`	-
`DATETIME`	`DATE`	Fractional parts of a second are truncated
`DECIMAL`	`NUMBER(p[,s])`	-
`DECIMAL` `IDENTITY`	`NUMBER(p[,s])`
`FLOAT`	`FLOAT(53)`	-
`IMAGE`	`LONG RAW`	-
`INT`	`NUMBER(10)`
`INT` `IDENTITY`	`NUMBER(10)`
`MONEY`	`NUMBER(19,4)`	-
`NCHAR`	`NCHAR`	if the size is 1000 or less. If the size is more than 1000, then it will be mapped to `LONG` Oracle Database Character Set = Unicode, otherwise, it is not supported.
`NTEXT`	`LONG`	if Oracle DB Character Set = Unicode. Otherwise, it is not supported
`NVARCHAR`	`NVARCHAR`	-
`NVARCHAR(MAX)`	`LONG`	`4000` < `N` if Oracle DB Character Set = Unicode. Otherwise, it is not supported.	`32767` < `N`
`NUMERIC`	`NUMBER(p[,s])`	-
`NUMERIC` `IDENTITY`	`NUMBER(p[,s])`
`REAL`	`FLOAT(24)`	-
`SMALLDATETIME`	`DATE`	-
`SMALLMONEY`	`NUMBER(10,4)`	-
`SMALLINT`	`NUMBER(5)`	-
`SMALLINT` `IDENTITY`	`NUMBER(5)`
`SYSNAME`	`NVARCHAR`	-
`TEXT`	`LONG`
`TIMESTAMP`	`RAW`	-
`TINYINT`	`NUMBER(3)`	-
`TINYINT` `IDENTITY`	`NUMBER(3)`
`VARBINARY`	`RAW`	`1` `N` `2000`	`1` <= `N` <= `32767`
`VARBINARY(MAX)`	`LONG RAW`	`2000` < `N`	`N` < `32767`
`VARCHAR`	`VARCHAR2`	`N` `4000`	`N` <= `32767`
`VARCHAR(MAX)`	`LONG`	`4000` < `N`	`32767` < `N`
`XML`	`LONG`	if Oracle Database Character Set = Unicode. Otherwise, it is not supported.