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直接看例子:
DELIMITER $$
CREATE DEFINER=`root`@`127.0.0.1` PROCEDURE `restore`(username varchar(50))
BEGIN
if username is not null then
update user set invalid=0 and activate_time=‘0000-00-00 00:00:00‘ where `name`=username;
else
update user set invalid=0 and activate_time=‘0000-00-00 00:00:00‘;
end if;
END$$
DELIMITER ;
调用:
1. call restore(‘abc‘);
or call restore(null);
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原文地址:http://www.cnblogs.com/tommy-huang/p/4475680.html