有谁可以给个MySql的 Update的存储过程的例子，模板啊，坐等，在线

Question

如题所述

Answer 1

创建一个存储过来用来监控mysql的SELECT、INSERT、UPDATE、DELETE使用情况。
## 创建存储过程pCheckDbStatus1()
drop procedure if exists pCheckDbStatus1;
delimiter //
create procedure pCheckDbStatus1()
begin
SET @uptime=0;
SET @com_select=0;
SET @com_insert=0;
SET @com_delete=0;
SET @com_update=0;
select @COM_DELETE:=variable_value FROM information_schema.GLOBAL_STATUS WHERE variable_name='COM_DELETE';
select @COM_INSERT:=variable_value FROM information_schema.GLOBAL_STATUS WHERE variable_name='COM_INSERT';
select @COM_SELECT:=variable_value FROM information_schema.GLOBAL_STATUS WHERE variable_name='COM_SELECT';
select @COM_UPDATE:=variable_value FROM information_schema.GLOBAL_STATUS WHERE variable_name='COM_UPDATE';
select @UPTIME:=variable_value FROM information_schema.GLOBAL_STATUS WHERE variable_name='UPTIME';
INSERT INTO DbStatus1
SELECT
NOW(),
(@com_select-com_select)/(@uptime-uptime),
(@com_insert-com_insert)/(@uptime-uptime),
(@com_update-com_update)/(@uptime-uptime),
(@com_delete-com_delete)/(@uptime-uptime)
FROM CheckDbStatus1 ORDER BY check_id DESC LIMIT 1;
INSERT INTO CheckDbStatus1 VALUES (NULL,now(),@uptime,@com_select,@com_insert,@com_update,@com_delete);
end;
//
delimiter ;

存储过程中需要用到两张表，所以我们还需要建立两张表，如下：
##创建表DbStatus1
CREATE TABLE `DbStatus1` (
`time` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`select_status` float DEFAULT NULL,
`insert_status` float DEFAULT NULL,
`update_status` float DEFAULT NULL,
`delete_status` float DEFAULT NULL,
PRIMARY KEY (`time`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

##创建表CheckDbStatus1
CREATE TABLE `CheckDbStatus1` (
`check_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`time` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`uptime` int(10) unsigned DEFAULT NULL,
`com_select` int(10) unsigned DEFAULT NULL,
`com_insert` int(10) unsigned DEFAULT NULL,
`com_update` int(10) unsigned DEFAULT NULL,
`com_delete` int(10) unsigned DEFAULT NULL,
PRIMARY KEY (`check_id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;本回答被提问者和网友采纳

Answer 2

DELIMITER $$

DROP PROCEDURE IF EXISTS getUserInfo $$

CREATE PROCEDURE getUserInfo(in date_day datetime)
--
-- 实例
-- MYSQL存储过程名为：getUserInfo
-- 参数为：date_day日期格式:2008-03-08
--
BEGIN
declare _userName varchar(12); -- 用户名
declare _chinese int ; -- 语文
declare _math int ; -- 数学
declare done int;

-- 定义游标
DECLARE rs_cursor CURSOR FOR SELECT username,chinese,math from userInfo where datediff(createDate, date_day)=0;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;

-- 获取昨天的日期
if date_day is null then
set date_day = date_add(now(),interval -1 day);
end if;

open rs_cursor;
cursor_loop:loop
FETCH rs_cursor into _userName, _chinese, _math; -- 取数据

if done=1 then
leave cursor_loop;
end if;

-- 更新表
update infoSum set total=_chinese+_math where UserName=_userName;
end loop cursor_loop;
close rs_cursor;

END$$

DELIMITER ;

Answer 3

MySQL教程4 MySQL8运算符、函数、存储过程及新增数据类型 17.之创建带有IN和OUT参数的存储过程 学习猿地