mysql的从另外一张表update多个字段到另外一张表中去

UPDATE t_advs_order  SET

attribute1=(SELECT o.order_state FROM tk_zyt_scenery_order o WHERE o.order_id=`on`),

attribute2=(SELECT o.order_state FROM tk_zyt_scenery_order o WHERE o.order_id=`on`)

WHERE EXISTS (SELECT o.order_state FROM tk_zyt_scenery_order o WHERE o.order_id=`on`);

这样效率比较低下, 优化写法:

UPDATE t_advs_order a INNER JOIN tk_zyt_scenery_order s ON s.order_id=a.`on` SET

a.attribute1=s.order_id,

a.attribute2=s.order_id;