很简单,但是看不懂
select distinct PROJ_ID from APPS.BUS_PLAN_PROJ --> ok
(select distinct PROJ_ID from APPS.BUS_PLAN_PROJ) --> ok
select distinct PROJ_ID from APPS.BUS_PLAN_PROJ order by PROJ_ID DESC --> ok
但
(select distinct PROJ_ID from APPS.BUS_PLAN_PROJ
order by PROJ_ID DESC) --> ORA-00907
它只是我真正的 sql 的一小部分。请帮我
注意:我用谷歌搜索但无法得到答案