我想每次使用一个不同的列执行相同的查询几次并打印列名称。
换句话说,我想执行以下操作:
第一个查询
SELECT DISTINCT [Name],[C12],'C12' AS [Description]
FROM #MyTable
第二个查询
SELECT DISTINCT [Name],[C13],'C13' AS [Description]
FROM #MyTable
第三次查询
SELECT DISTINCT [Name],[C14],'C14' AS [Description]
FROM #MyTable
我从现在开始做的是以下代码:
DECLARE @Member AS VARCHAR(20)
DECLARE Csr cursor for SELECT 'C12' UNION SELECT 'C13' UNION SELECT 'C14'
OPEN Csr
FETCH NEXT FROM Csr INTO @Member
WHILE (@@fetch_status <> -1)
BEGIN
exec('SELECT DISTINCT [Name],'+@Member+', ''+@Member+'' AS [Description]
FROM #MyTable
')
FETCH NEXT FROM Csr INTO @Member
END
CLOSE Csr
DEALLOCATE Csr
这是接近期望的结果,而是我得到的qazxsw poi列
+ @ +会员
而不是每次迭代分配给变量的值。
有人能帮帮我吗?
不需要游标,可以使用动态SQL轻松完成:
Description