mysql 一条sql更新多张表数据，

	<update id="deleteActor"  parameterType="java.lang.String">
		UPDATE 
			actor_tbl a	LEFT JOIN video_actor_tbl b ON a.sn = b.actorsn 
		SET a.is_del = 1,
			b.is_del = 1 
		WHERE
			a.sn = #{sn}
	</update>