1、在mysql 中建立一个数据库 test1 
语句:create database test1 
2、创建表examinfo 
create table examinfo( 
id int auto_increment not null, 
endtime datetime, 
primary key(id) 
); 
3 插入数据: 
insert into examinfo values('1','2011-4-23 23:26:50'); 
4 创建存储过程test 
CREATE PROCEDURE test () 
BEGIN 
update examinfo SET endtime = now() WHERE id = 1; 
END; 
5、 创建event e_test 
 
CREATE EVENT if not exists e_test 
on schedule every 30 second 
on completion preserve 
do call test(); 
 6、查看event是否开启: show variables like '%sche%'; 
将事件计划开启: set global event_scheduler=1; 
关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE; 
开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE; 
7、运行查询结果即可出现想要的结果。
结果显示如下:
 原始数据:

过一段时间查询后的数据: