/*********DONOT USE THIS CODE UNTIL YOU KNOW WHAT IT DOES ***************** DONOT USE THIS CODE This code basically removes records from codono_trade where userid=0 efficiently. */ Paste following code to phpMyAdmin after selecting database DELIMITER // CREATE PROCEDURE SwapTradeTables() BEGIN -- Step 1: Copy table codono_trade to new_trade where userid != 0 CREATE TABLE new_trade LIKE codono_trade; INSERT INTO new_trade SELECT * FROM codono_trade WHERE userid != 0; -- Step 2: Rename codono_trade to old_trade RENAME TABLE codono_trade TO old_trade; -- Step 3: Rename new_trade to codono_trade RENAME TABLE new_trade TO codono_trade; END // DELIMITER ; After creating this stored procedure, you can execute it by calling the procedure name: CALL SwapTradeTables(); Make sure to run this code within your MySQL database management tool (e.g., phpMyAdmin, MySQL command-line tool) while connected to your database. /*********DONOT USE THIS CODE UNTIL YOU KNOW WHAT IT DOES ******************/