我在mysql数据库中有以下三个名为“My_Company”的表
mysql> desc employee;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| Id | int(11) | NO | PRI | 0 | |
| Emp_Name | varchar(20) | YES | | NULL | |
| Division | varchar(20) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
3 rows in set (0.00 sec)
mysql> desc tools;
+-----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+-------------+------+-----+---------+-------+
| Division | varchar(20) | NO | PRI | | |
| Tool_No | int(11) | NO | PRI | 0 | |
| Tool_Name | varchar(20) | YES | | NULL | |
+-----------+-------------+------+-----+---------+-------+
3 rows in set (0.01 sec)
mysql> desc employee_tools;
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| Id | int(11) | YES | | NULL | |
| Tool | varchar(20) | YES | | NULL | |
| Status | varchar(20) | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
2 rows in set (0.02 sec)
-------------------------------------------------------------------------------------
我需要在表employee上插入一个新行时,将表工具中的行插入到employee_tools表中。
示例,如果我向员工的值插入一个新行('1','Michel','Network') 然后触发器应该从表工具中找到除法的tool_names 并将行添加到employee_tools
mysql> insert into employee values('1','Michel','Network');
Query OK, 1 row affected (0.05 sec)
mysql> select * from employee;
+----+----------+----------+
| Id | Emp_Name | Division |
+----+----------+----------+
| 1 | Michel | Network |
+----+----------+----------+
1 row in set (0.00 sec)
mysql> select * from tools;
+----------+---------+--------------+
| Division | Tool_No | Tool_Name |
+----------+---------+--------------+
| Network | 1 | Crimper |
| Network | 2 | LAN Tester |
| Network | 3 | Sleaver |
| Hardware | 1 | Screw drv |
| Hardware | 2 | Power Tester |
| Hardware | 3 | Plyer |
+----------+---------+--------------+
3 rows in set (0.00 sec)
mysql> select * from employee_tools;
+------+------------+------------+
| Id | Tool |Status |
+------+------------+------------+
| 1 | Crimper |Working |
| 1 | LAN Tester |working |
| 1 | Sleaver |working |
+------+------------+------------+
3 rows in set (0.00 sec)
状态将手动更新,如下所示......
+------+------------+------------+
| Id | Tool |Status |
+------+------------+------------+
| 1 | Crimper |Working |
| 1 | LAN Tester |Not working |
| 1 | Sleaver |Broken |
+------+------------+------------+
答案 0 :(得分:5)
简单:
DROP TRIGGER IF EXISTS trg_emp_tools;
CREATE TRIGGER trg_emp_tools AFTER INSERT ON employee
FOR EACH ROW
BEGIN
INSERT INTO employee_tools (Id, Tool, Status)
SELECT NEW.Id, tools.Tool_Name, 'Working'
FROM
tools
WHERE Division = NEW.Division;
END;
答案 1 :(得分:0)
那些人使用phpmyadmin,你需要在触发器中添加分隔符:
delimiter $$
DROP TRIGGER IF EXISTS copy_trig;
CREATE TRIGGER copy_trig AFTER INSERT ON test
FOR EACH ROW
BEGIN
insert into test_archive
select * from test where id = New.id;
END$$
delimiter ;