UNIONALL通过select*fromAUNIONALLselect*fromB查询后怎样将A，B两个表同时排序啊而且要A表的数据排序完成
UNION ALL
通过
select * from A
UNION ALL
select * from B
查询后怎样将A，B两个表同时排序啊
而且要A表的数据排序完成后，在将B表排序啊。
[解决办法]
select col1,col2,col3 from
(select 0 as sn,col1,col2,col3 from A
UNION ALL
select 1 as sn,col1,col2,col3 from B) t
order by sn,其它要排序的列