mysql_insert_id with update

Question

After executing the query below I use the PHP function mysql_insert_id() and it always gives me 0.

UPDATE 
    tbl_training_types 
SET 
    fld_seri         


        

Answer 1

Return Values

The ID generated for an AUTO_INCREMENT column by the previous query on success, 0 if the previous query does not generate an AUTO_INCREMENT value, or FALSE if no MySQL connection was established.

Source PHP Manual