sql調度器更新餘額留下

Question

這是我的信用假表。

creditleaveid empid creditleavemonth creditedleaves 
1    21  March    1 

我使用的調度下月插入到信用卡/此表的平衡休假

DELIMITER $$ 
CREATE EVENT creditleavemonth 
ON SCHEDULE EVERY '1' MONTH 
STARTS '2017-02-01 00:00:00' 
DO 
BEGIN 
CALL spAddCreditLeaves; 
END$$ 

DELIMITER ; 

存儲過程spAddCreditLeaves是

DELIMITER $$ 

USE `attendance`$$ 

DROP PROCEDURE IF EXISTS `spAddCreditLeaves`$$ 

CREATE DEFINER=`root`@`localhost` PROCEDURE `spAddCreditLeaves`() 
BEGIN 
INSERT INTO creditleaves(empid,creditleavemonth)SELECT empid,MONTHNAME(CURDATE())FROM empdetails; 
END$$ 

DELIMITER ; 

現在我想更新的記錄通過檢查每個員工的上個月的記錄來插入月份。怎麼做？

Answer 1

我已經得到了我的答案。它工作得非常好。存儲過程-

USE `attendance`$$ 

DROP PROCEDURE IF EXISTS `spAddCreditLeaves`$$ 

CREATE DEFINER=`root`@`localhost` PROCEDURE `spAddCreditLeaves`() 
BEGIN 
IF MONTHNAME(CURDATE())='January' 
THEN 
INSERT INTO creditleaves(empid,creditleavemonth,creditmonthyear,creditedleaves) SELECT empid,MONTHNAME(CURDATE()),YEAR(CURDATE()),creditedleaves+1 FROM creditleaves WHERE empid IN (SELECT empid FROM empdetails GROUP BY empid) AND creditedleaves IN(SELECT creditedleaves FROM creditleaves WHERE creditleavemonth=MONTHNAME((CURDATE()-INTERVAL 1 MONTH)) AND creditmonthyear=YEAR((CURDATE()-INTERVAL 1 YEAR))); 
ELSE 
INSERT INTO creditleaves(empid,creditleavemonth,creditmonthyear,creditedleaves) SELECT empid,MONTHNAME(CURDATE()),YEAR(CURDATE()),creditedleaves+1 FROM creditleaves WHERE empid IN (SELECT empid FROM empdetails GROUP BY empid) AND creditedleaves IN(SELECT creditedleaves FROM creditleaves WHERE creditleavemonth=MONTHNAME((CURDATE()-INTERVAL 1 MONTH)) AND creditmonthyear=YEAR(CURDATE())); 
END IF; 
END$$ 

DELIMITER ;