Mysql中如何将数据表中的A字段值全部替换成对应的B字段值?

2025-03-22 22:55:13
推荐回答(2个)
回答1:

1update a inner join b on a.bid=b.id set a.x=b.x,a.y=b.y ;

回答2:

UPDATE phome_ecms_live
SET filename = (
SELECT
CONCAT(aa.id, aa.filename)
FROM
(
SELECT
id,
filename
FROM
phome_ecms_live
) aa
)