插入之前的Mysql从一个表触发到fetchdata并插入另一个表

Question

以下是我的用户月薪表

+-------+------------+
|user_id|user_salary |
+-------+------------+
| 6     | 10000      |
+-------+------------+

这是我的每日出勤表

+-------------+---------+------+-------+---------------+-------+
|attendance_id| user_id |name  |present|attendance_date| wages |
+-------------+---------+------+-------+---------------+-------+
| 1   |       | 6       | parth| P     |2016-12-16     |  350  |  
+-------------+---------+------+-------+---------------+-------+

以上是我的工资和考勤表，我想按月工资插入每日工资，并使用下面的触发器插入考勤表是我的触发代码。我想每天= monthly_salary / days_in_month并插入出勤工资表。

trigger wages before insert on attendance 
for each row
set NEW.wages=(select user_salary from salary where user_id=NEW.user_id)/(SELECT DAY(LAST_DAY(now()))) 

Answer 1

您忘记了CREATE行中的BEFORE INSERT ON命令。

一个工作的例子是：

DELIMITER $$
CREATE TRIGGER `trigger` BEFORE INSERT ON `attendance`
FOR EACH ROW
BEGIN
 SET NEW.room = (SELECT user_salary from salary where user_id=NEW.user_id)/(SELECT DAY(LAST_DAY(now())));
END $$
DELIMITER ;

Answer 2

DELIMITER $$
CREATE TRIGGER `trigger` BEFORE INSERT ON `attendance`
FOR EACH ROW
BEGIN
SET NEW.wages = (SELECT user_salary from salary where user_id = NEW.user_id)/(SELECT DAY(LAST_DAY(now())));
END $$
DELIMITER ;