Question

我想查找数据库中包含两列LOCATION和ASSET_ID

的所有表格

所以我尝试了这个：

select owner, table_name, column_name
from all_tab_columns
where column_name in ('LOCATION','ASSET_ID');

问题是此查询会为所有包含LOCATION或ASSET_ID的表格提供这两个表格。

所以我把它改成了这个：

select owner, table_name, column_name
from all_tab_columns
where 1=1
and column_name ='LOCATION'
and column_name = 'ASSET_ID';

它显示0结果。

请帮忙。

Answer 1

选择初始尝试中的所有行。然后按owner和table_name进行分组，并仅保留初始查询中返回两行的那些内容。使用having子句：

select   owner, table_name
from     all_tab_columns
where    column_name in ('LOCATION','ASSET_ID')
group by owner, table_name
having   count(*) = 2
;

Answer 2

您可以使用一些子查询来做到这一点，这些子查询被考虑为公共表表达式和连接，如：

WITH cteLOCATION AS (SELECT OWNER, TABLE_NAME
                       FROM ALL_TAB_COLS
                       WHERE COLUMN_NAME = 'LOCATION'),
     cteASSET_ID AS (SELECT OWNER, TABLE_NAME
                       FROM ALL_TAB_COLS
                       WHERE COLUMN_NAME = 'ASSET_ID')
SELECT OWNER, TABLE_NAME
  FROM cteLOCATION
  NATURAL JOIN cteASSET_ID

这是我使用NATURAL JOIN的极少数情况之一。

SQLFiddle here

祝你好运。

Answer 3

使用连接（类似于@ BobJarvis＆＃39; https://stackoverflow.com/a/47984132/754550但更传统而不带 - 子句）：

select a1.owner,a1.table_name
from all_tab_columns a1, 
    all_tab_columns a2
where a1.owner=a2.owner
    and a1.table_name=a2.table_name
    and a1.column_name='LOCATION'
    and a2.column_name='ASSET_ID'
order by a1.owner,a1.table_name

或使用集合：

    select owner, table_name
    from all_tab_columns
    where column_name='LOCATION'
intersect 
    select owner, table_name
    from all_tab_columns
    where column_name='ASSET_ID'
order by owner, table_name

或使用＆＃39; group by＆＃39; @mathguy

已在https://stackoverflow.com/a/47981174/754550张贴的条款

select owner, table_name
from all_tab_columns
where column_name in ('LOCATION', 'ASSET_ID')
group by owner, table_name
having count(*)=2
order by owner, table_name

Answer 4

试试这个，

SELECT *
  FROM (SELECT a.*,
               COUNT(1) OVER (PARTITION BY table_name) cnt
          FROM all_tab_columns a
         WHERE column_name IN ('LOCATION','ASSET_ID')
         ORDER BY table_name)
 WHERE cnt = 2

Oracle查找具有特定列的所有表

4 个答案: