假如 UNION ALL 里面的子句 有 JOIN ,那个执行更快呢 比如:selectid,namefromtable1wherename='x'unionallselectid,namefromtable2wherename='x'与select*from(selectid,namefromtable1unionallselectid,namefromtable2)whe... Other 2023-10-25 40 点赞 0 评论 60 浏览