Example analysis of mysql stored procedure usage

DELIMITER //
CREATE PROCEDURE proc (IN num INT)
BEGIN
SELECT * FROM v9_qd_account limit num;
END //
DELIMITER ;

SET @p_in=5;
CALL proc(@p_in);

CALL proc(5);

DECLARE num int default 5;
SET num = 1;
SET num = num + 1;

DELIMITER //
CREATE PROCEDURE proc(IN sname VARCHAR(20), IN pwd VARCHAR(5), IN qd INT, IN start INT, IN end INT)
  begin
  DECLARE var INT;
  DECLARE myname VARCHAR(30);
  SET var=start;
  while var<end do
    SET myname = CONCAT(sname,LPAD(var,3,'0'));
    insert into v9_qd_account (storename,password,qudao,regdate) value(myname,md5(pwd),qd,UNIX_TIMESTAMP());
    SET var=var+1;
  end while;
  end //
DELIMITER ;

CALL proc('test','123456',1,1,21);

SHOW PROCEDURE STATUS LIKE 'C%' \G; View stored procedures starting with the letter C SHOW CREATE PROCEDURE proc \G; View the status and creation statement View in information_schema.Routines

DROP PROCEDURE IF EXISTS proc;
DROP FUNCTION mytest;

CREATE PROCEDURE useInfo(IN u_name VARCHAR(50) character set gbk,OUT u_age INT) ......