sql - 检索包含列组合的所有表名

Question

有没有办法从包含两个或多个列的组合的数据库中选择所有表名:column1 AND column2？ 我认为这不是正确的方法:

select table_name from information_schema.columns where column_name = 'column1';

Answer 1

尝试使用 CTE 包含 array aggregator 。接线员<@将寻找元素的精确组合。

WITH j AS (
  SELECT table_name, array_agg(column_name::TEXT) AS columns
  FROM information_schema.columns 
  GROUP BY table_name)
SELECT * FROM j
WHERE '{column1,column1}' <@ j.columns

示例:

WITH j AS (
  SELECT table_name, array_agg(column_name::TEXT) AS columns
  FROM information_schema.columns 
  GROUP BY table_name)
SELECT * FROM j
WHERE '{name,statement}' <@ j.columns;

       table_name       |                              columns                               
------------------------+--------------------------------------------------------------------
 pg_prepared_statements | {name,statement,prepare_time,parameter_types,from_sql}
 pg_cursors             | {name,statement,is_holdable,is_binary,is_scrollable,creation_time}
(2 Zeilen)