infocom老是通不过edas检查# TeX - TeX电子排版系统
s*y
1 楼
大家说说这两个output会有区别吗(在同一个schema下)?
如果有,区别是什么?
另外, 有了user_objects,是不是CAT view其实是多余的?
(1)
select distinct table_name
from cat
(2)
select distinct object_name
from user_objects
where object_type in
(
select distinct table_type
from cat
)
)
如果有,区别是什么?
另外, 有了user_objects,是不是CAT view其实是多余的?
(1)
select distinct table_name
from cat
(2)
select distinct object_name
from user_objects
where object_type in
(
select distinct table_type
from cat
)
)