这就是系统目录的用途:
select count(*)
from all_tab_columns
where owner = 'SOME_USER'
and table_name = 'SOME_TABLE';
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要按表获取它,请使用`group by
select table_name, count(*)
from all_tab_columns
where owner = 'SOME_USER'
group by table_name
order by table_name;
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有关系统目录的更多详细信息,请参见手册:
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