在SQL Server中查找共享列

Question

我可以运行快速查询,返回两个表之间的所有同名列吗？

我有很多对我知道捆绑在一起的桌子,但我不确定它们共有50个左右的哪个列.

Answer 1

select COLUMN_NAME
from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME in ('Table1', 'Table2')
group by COLUMN_NAME
having count(*) > 1

你也可以这样做,找到所有对而不指定名称.这也将匹配视图:

select c1.COLUMN_NAME, c1.TABLE_NAME as Table1, c2.TABLE_NAME as Table2
from INFORMATION_SCHEMA.COLUMNS c1
inner join INFORMATION_SCHEMA.COLUMNS c2 on c1.COLUMN_NAME = c2.COLUMN_NAME and c1.TABLE_NAME <> c2.TABLE_NAME
order by 2, 1

如果要排除视图,可以执行以下操作:

select c1.COLUMN_NAME, c1.TABLE_NAME as Table1, c2.TABLE_NAME as Table2
from INFORMATION_SCHEMA.COLUMNS c1
inner join INFORMATION_SCHEMA.COLUMNS c2 on c1.COLUMN_NAME = c2.COLUMN_NAME and c1.TABLE_NAME <> c2.TABLE_NAME
inner join INFORMATION_SCHEMA.TABLES t1 on c1.TABLE_NAME = t1.TABLE_NAME and t1.TABLE_TYPE = 'BASE TABLE'
inner join INFORMATION_SCHEMA.TABLES t2 on c2.TABLE_NAME = t2.TABLE_NAME and t2.TABLE_TYPE = 'BASE TABLE'
order by 2, 1