SQL Server从查询返回的表中选择作为表名列表

Question

如果我有以下表格:

PLAYERS

ID    Name
==    ===========
1     Mick
2     Matt

教练员

ID    Name
==    ===========
1     Bill
2     Don

我在下面有一个脚本来查找所有包含名为"Name"的列的表:

SELECT t.name AS table_name FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE 'Name'

返回以下内容:

table_name
===========
PLAYERS
COACHES

如何从上面的查询返回的两个表中选择所有行？

Answer 1

您将不得不使用动态SQL,尝试这样的事情:

declare @t table( tablename varchar(50))
declare @sql varchar(max)
set @sql = ''

insert into @t
SELECT t.name AS table_name FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE 'Name'

select @sql = @sql + 'Select * From ' + tablename + ' union ' from @t

--remove the trailing 'union'
Select @sql = substring(@sql, 1, len(@sql) - 6)

exec (@sql)

上面的脚本创建并执行以下sql

select * from coaches
union
select * from players

由于我们在union这里使用,所以具有nameas列的所有表都具有相同的结构非常重要.

从http://msdn.microsoft.com/en-us/library/ms188001.aspx查看有关动态sql的更多信息