Question

我试图做一个前10名，但将多个列加在一起并按一定日期范围内的组件将它们分组，如果我取出SUM，它就像一个符咒，但是当我将它们放回去时，出现以下异常，已经有一段时间了，我可能只是脑袋了。

sql = "SELECT TOP 10 ComponentName, (SUM(ISNULL(ulCompSizeFailure,0)) + SUM(ISNULL(ulLeadCountFailure,0)) + SUM(ISNULL(ulVPSHeightFailure,0))) as Total 
       FROM [i_import_slot_vision_errors] 
       WHERE DATE_TIME >= @startdata2 
           AND DATE_TIME < @enddata2 
       GROUP BY ComponentName 
       ORDER BY (SUM(ISNULL(ulCompSizeFailure,0)) + SUM(ISNULL(ulLeadCountFailure,0)) + SUM(ISNULL(ulVPSHeightFailure,0))) as Total DESC"

问题是我收到了SQL异常，“关键字'as'附近的语法不正确。”

Answer 1

这是一种正确的语法，您不能为ORDER BY子句加上别名。

SELECT TOP 10 ComponentName, (SUM(ISNULL(ulCompSizeFailure,0)) + SUM(ISNULL(ulLeadCountFailure,0)) + SUM(ISNULL(ulVPSHeightFailure,0))) as Total 
FROM [i_import_slot_vision_errors] 
WHERE DATE_TIME >= @startdata2 AND DATE_TIME < @enddata2 
GROUP BY ComponentName 
ORDER BY Total DESC

别忘了，在SQL中ORDER BY之后，SELECT子句被计算机读取，您可以在SELECT中使用ORDER BY中的别名。

SQL添加多列

1 个答案: