mysql - 应该在 mysql 中的哪里定义 create TRIGGER

Question

SQL查询:

CREATE TRIGGER testref BEFORE INSERT ON users
FOR EACH
ROW BEGIN 
INSERT INTO users_roles
SET uid = NEW.uid;

MySQL 说:

#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 3 

Answer 1

drop table if exists users;
create table users
(
user_id int unsigned not null auto_increment primary key,
username varchar(32) not null,
created_date datetime not null
)
engine=innodb;

delimiter #

create trigger users_before_ins_trig before insert on users
for each row
begin
  set new.created_date = now();
end#

delimiter ;

insert into users (username) values ('f00'),('bar');

mysql> select * from users;
+---------+----------+---------------------+
| user_id | username | created_date        |
+---------+----------+---------------------+
|       1 | f00      | 2011-03-14 12:39:38 |
|       2 | bar      | 2011-03-14 12:39:38 |
+---------+----------+---------------------+
2 rows in set (0.00 sec)

编辑

触发器就是您所需要的 - 根据您的模式进行适当的编辑!!

delimiter #

create trigger users_before_ins_trig before insert on users
for each row
begin
  set new.created_date = now();
end#

delimiter ;