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IDENT_CURRENT

SQL Server 2000

Returns the last identity value generated for a specified table in any session and any scope.

Syntax

IDENT_CURRENT('table_name')

Arguments

table_name

Is the name of the table whose identity value will be returned. table_name is varchar, with no default.

Return Types

sql_variant

Remarks

IDENT_CURRENT is similar to the Microsoft® SQL Server™ 2000 identity functions SCOPE_IDENTITY and @@IDENTITY. All three functions return last-generated identity values. However, the scope and session on which 'last' is defined in each of these functions differ.

  • IDENT_CURRENT returns the last identity value generated for a specific table in any session and any scope.

  • @@IDENTITY returns the last identity value generated for any table in the current session, across all scopes.

  • SCOPE_IDENTITY returns the last identity value generated for any table in the current session and the current scope.
Examples

This example illustrates the different identity values returned by IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY.

USE pubs
DROP TABLE t6
DROP TABLE t7
GO
CREATE TABLE t6(id int IDENTITY)
CREATE TABLE t7(id int IDENTITY(100,1))
GO
CREATE TRIGGER t6ins ON t6 FOR INSERT 
AS
BEGIN
   INSERT t7 DEFAULT VALUES
END
GO
--end of trigger definition

SELECT   * FROM t6
--id is empty.

SELECT   * FROM t7
--id is empty.

--Do the following in Session 1
INSERT t6 DEFAULT VALUES
SELECT @@IDENTITY      
/*Returns the value 100, which was inserted by the trigger.*/

SELECT SCOPE_IDENTITY()   
/* Returns the value 1, which was inserted by the 
INSERT stmt 2 statements before this query.*/

SELECT IDENT_CURRENT('t7')
/* Returns value inserted into t7, i.e. in the trigger.*/

SELECT IDENT_CURRENT('t6')
/* Returns value inserted into t6, which was the INSERT statement 4 stmts before this query.*/

-- Do the following in Session 2
SELECT @@IDENTITY
/* Returns NULL since there has been no INSERT action 
so far in this session.*/

SELECT SCOPE_IDENTITY()
/* Returns NULL since there has been no INSERT action 
so far in this scope in this session.*/

SELECT IDENT_CURRENT('t7')
/* Returns the last value inserted into t7.*/

See Also

@@IDENTITY

SCOPE_IDENTITY

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