union all和order by一起使用出問題
阿新 • • 發佈：2018-12-23
select * from (select * from (select zxbz,count(*)rs from dc_jhmy where 1=1 group by zxbz order by rs desc
union all
select 'hj' as zxbz,count(*)rs from dc_jhmy where 1=1)where rownum <= 100
SQL語句如上，我想實現除最後的union all 之前所有的記錄先排序，然後在加上最後一條記錄，可是 order by rs desc
放在現在的位置報錯，命令未正確結束。
解決方法如下:利用臨時表
select * from (select * from (select zxbz,count(*)rs from dc_jhmy where 1=1 group by zxbz order by rs desc)
union all
select 'hj' as zxbz,count(*)rs from dc_jhmy where 1=1)where rownum <= 100