Question

On my db-server i am inserting data in a table having a auto increment field say ‘id’. Now i want to use the value of this last inserted ‘id’ in subsequent steps. I can use this:-

  select * from table_name order by id desc limit 1; 

But the problem here is, it is a server and many more insertions could be happening and there could be a case where i try to retrieve the data with the query i mentioned and get a different id ie. between my insert and select there could be some other insert and i wont get the value i inserted. Any way in which this could be addressed.?

Thanks in advance.

Answer 1

Use this

mysql_insert_id(&mysql);  

as its basic structure are

mysql_insert_id ([ resource $link_identifier = NULL ] )

Retrieves the ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT).

or in mysql use

   SELECT LAST_INSERT_ID();

here is the ref links

http://dev.mysql.com/doc/refman/5.0/en/getting-unique-id.html

http://php.net/manual/en/function.mysql-insert-id.php