Question

如何在SQL Server中将选择查询的列标题检索为单个列？（最好检索列的数据类型）

查询示例：

select a.PartId, a.PartName, b.GroupName 
from Parts as a 
inner join Groups as b on a.GroupRef = b.GroupId

预期结果：

Columns 
--------
PartId
PartName
GroupName

Answer 1

从SQL Server 2012+开始，您可以使用sys.dm_exec_describe_first_result_set获取有关结果集的所有元数据：

<强> DBFiddle Demo

DECLARE @tsql NVARCHAR(MAX) = 
  N'select a.PartId , a.PartName , b.GroupName 
from Parts as a inner join Groups as b 
on a.GroupRef = b.GroupId';

SELECT name AS [Columns]
FROM sys.dm_exec_describe_first_result_set(@tsql, NULL, 1)

Answer 2

一种方法是使用结果集的模式创建临时表，然后查询tempdb的模式表以获取列名称和详细信息。您可以获得所有需要的详细信息。

    select a.PartId , a.PartName , b.GroupName into #yourtable
    from Parts as a inner join Groups as b 
    on a.GroupRef = b.GroupId
    where 1=2

    SELECT c.name as columnname,t.name as datatype
    FROM tempdb.sys.columns c
            inner join tempdb.sys.systypes as t on t.xtype = c.system_type_id
    WHERE [object_id] = OBJECT_ID(N'tempdb..#yourtable');

Answer 3

    SELECT 'PartId', 'PartName', 'GroupName'
    UNION ALL
    select a.PartId , a.PartName , b.GroupName 
    from Parts as a inner join Groups as b 
    on a.GroupRef = b.GroupId

如何检索选择查询的列标题？

3 个答案: