SQL - INSERT and catch the id auto-increment value

Question

What is the best way to get the auto-id value in the same SQL with a SELECT?

A forum said adding this \"; has Return Scope_Identity()\"
in the end

Answer 1

It depends on your database server. Using MySQL, call mysql_insert_id() immediately after your insert query. Using PostgreSQL, first query "select nextval(seq)" on the sequence and include the key in your insert query.

Querying for "select max(id) + 1 from tbl" could fail if another request inserts a record simultaneously.

Answer 2

In Microsoft Transact SQL you can use @@IDENTITY.

e.g.

DECLARE @Table TABLE ( col0 INT IDENTITY, col1 VARCHAR(255), col2 VARCHAR(255))

INSERT INTO @Table (col1, col2) VALUES ('Hello','World!')

SELECT @@Identity

SELECT * FROM @Table

Answer 3

In postgres the best way is to do something like:

insert into foos(name) values ('my_foo') returning id;

Answer 4

It depends on the database engine you are using. Some DBMS, like Firebird for example, have RETURNING clause you can add to your query. For example, if you have a table named TABLE1 with autoincrement column named ID, you can use this:

insert into TABLE1(columns...) values (values...) returning ID;

And it would return the inserted ID just like a regular select statement.

Answer 5

Be very careful: Apparently select nextval(seq) does not work in high concurrency - some other connection can insert between the time when you inserted and the time when you called select nextval(seq). Always test such code in high concurrency test harnesses.

Answer 6

In php: mysql_insert_id() http://us3.php.net/mysql_insert_id

or

If you wanted to genterate the number from your mySql select query, you could use this EDIT:

SELECT LAST_INSERT_ID(`1`) + 1 FROM table