问mysql插入-选择语法错误

EN

$q = "CREATE TEMPORARY TABLE tmp SELECT * from category c  WHERE category_id IN (SELECT category_id FROM category_to_store WHERE store_id = '".(int)$from_store_id."');
                ALTER TABLE tmp drop category_id; 
                INSERT INTO category SELECT 0,tmp.* FROM tmp;
                SET @last_id_in_category := LAST_INSERT_ID();
                select @last_id_in_category;
                DROP TABLE tmp;"

mysql_query($q);