Question

我有一些我试图运行的示例代码。只更改了表名和列名。我想要做的是拥有状态的结果集并且具有“空”＆＃39;是第一个值，其余结果显示在＆＃39; NULL＆＃39;按升序排列，我不能让我的生活变得有效。我在底部得到错误。这可能是一个非常＆＃34; noobish＆＃34;问题，但任何人都可以帮忙吗？非常感谢所有人！

SELECT  DISTINCT
    State
FROM    TABLE1 (NOLOCK)
WHERE   COLUMN1 NOT LIKE '%THAT%'
    AND COLUMN1 NOT LIKE '%THIS%'
UNION
SELECT  'NULL'
ORDER BY ( CASE WHEN State = 'NULL' THEN 0
            ELSE 1
       END );

错误讯息：

ORDER BY items must appear in the select list if the statement contains a UNION, INTERSECT or EXCEPT operator.

Answer 1

您需要选择该列...即使您以后不使用它，订单也要求它出现在选择中。

SELECT  DISTINCT
    State,
 CASE WHEN State = 'NULL' THEN 0
            ELSE 1 END orderId
FROM    TABLE1 (NOLOCK)
WHERE   COLUMN1 NOT LIKE '%THAT%'
    AND COLUMN1 NOT LIKE '%THIS%'
ORDER BY ( CASE WHEN State = 'NULL' THEN 0
            ELSE 1
       END );

ORDER BY CASE WHEN：ORDER BY项目必须出现在选择列表中

1 个答案: