小结

1、mysql 无法插入、删除数据 Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Queries and reconnect.

解决方案:SET SQL_SAFE_UPDATES = 0;

2、mysql 定期清除表数据
(1)写存储过程：
create procedure del_data(IN `date_inter` int)
begin
delete from log where time < date_sub(curdate(),interval date_inter day);
end
(2)写event事件
create event del_event
on schedule
EVERY 1 day
STARTS '2016-11-20 03:00:00'
ON COMPLETION PRESERVE ENABLE
do call del_data(7)

关闭事件任务: alter event del_event ON COMPLETION PRESERVE DISABLE;
开户事件任务: alter event del_event ON COMPLETION PRESERVE ENABLE;

查看刚才新建的事件:show events

查看event是否开启: show variables like '%---%';
将事件计划开启: set global event_scheduler = ON;

3、GridView GridView1.Rows[index].Cells[4].Text;返回值为空。
解决方案:string card = ((Label)GridView1.Rows[index].Cells[4].FindControl("Label4")).Text;

4、

Response.Write("<script language=javascript>alert('保存成功！');window.location = './PersonalInfo.aspx';</script>");