mysql使用一张表的数据更新另一张表update

Posted 2021-07-05 好大的月亮

方法1

demo是将class_name赋值为 company

UPDATE work w 
SET w.class_name = (
	SELECT
		a.company 
	FROM
		( SELECT * FROM work ) a 
	WHERE
	a.id = w.id 
	)

方法2

update table_1 t1,table_2 t2 set t1.column = t2.column where t1.id = t2.pid;