mysql数据库之批量更新语法

1.insert into ...on duplicate key update批量更新

2.replace into 批量更新

3.临时表

SELECT * FROM `makemoneyinfo` where dakuanaccount = accountnumber order by creationtime

select no,bank2 from sap_cw_notice where no in(
SELECT bankid FROM `makemoneyinfo` where dakuanaccount = accountnumber )

dakuanaccount(财务账号)

update makemoneyinfo set dakuanaccount =
case when no = '' then '' end,
dakuanaccount =
end

--批量更新列的位置，从一个表导入另一个（只关心列的位置）
replace into makemoneyinfo( name, id) select rname, rtitle, rmood from tb2;

创建临时表，先更新临时表，然后从临时表中update

select * from tmp;

-- 创建临时表
CREATE TEMPORARY TABLE tmp ( NO VARCHAR ( 100 ) PRIMARY KEY, bank2 VARCHAR ( 50 ) );
--插入数据
INSERT INTO tmp SELECT NO
,
bank2
FROM
   sap_cw_notice
WHERE
   NO IN ( SELECT bankid FROM `makemoneyinfo` WHERE dakuanaccount = accountnumber );

   -- 更新目标表数据
UPDATE makemoneyinfo,
tmp
SET makemoneyinfo.dakuanaccount = tmp.bank2
WHERE
   makemoneyinfo.bankid = tmp.NO;

4.使用mysql 自带的语句构建批量更新

参考链接：

https://blog.csdn.net/h330531987/article/details/79114563

https://www.cnblogs.com/PatrickLiu/p/6385167.html

https://www.cnblogs.com/c-961900940/p/6197878.html

https://www.runoob.com/sql/sql-insert-into-select.html

来源：https://blog.csdn.net/sinat_35619327/article/details/101348725

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mysql update语句