I want to create a trigger in MySQL. I run following commands:
我想在MySQL中创建一个触发器。我运行以下命令:
mysql> delimiter //
mysql> CREATE TRIGGER before_insert_money BEFORE INSERT ON money
-> FOR EACH ROW
-> BEGIN
-> UPDATE accounts SET balance=10.0;
-> END;
-> //
Query OK, 0 rows affected (0.19 sec)
But when I run above SQL in phpmyadmin I get this error:
但是当我在phpmyadmin中运行SQL时,我收到此错误:
#1064 - You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to
use near '' at line 4
what's wrong here? How do I create a trigger?
这有什么不对?如何创建触发器?
1 个解决方案
#1
10
This is caused by not changing the delimiters temporarily as you did via CLI. Try either:
这是因为您没有像通过CLI那样暂时更改分隔符。尝试:
CREATE TRIGGER before_insert_money BEFORE INSERT ON money
FOR EACH ROW UPDATE accounts SET balance=10.0;
or
delimiter //
CREATE TRIGGER before_insert_money BEFORE INSERT ON money
FOR EACH
ROW
BEGIN
UPDATE accounts SET balance=10.0;
END;
//
delimiter ;
See: This question and this question.
看:这个问题和这个问题。
#1
10
This is caused by not changing the delimiters temporarily as you did via CLI. Try either:
这是因为您没有像通过CLI那样暂时更改分隔符。尝试:
CREATE TRIGGER before_insert_money BEFORE INSERT ON money
FOR EACH ROW UPDATE accounts SET balance=10.0;
or
delimiter //
CREATE TRIGGER before_insert_money BEFORE INSERT ON money
FOR EACH
ROW
BEGIN
UPDATE accounts SET balance=10.0;
END;
//
delimiter ;
See: This question and this question.
看:这个问题和这个问题。