Question

所以我提供了这个代码来添加一个行列，但是，当我尝试按该行列进行过滤时，它会显示＆＃39; Row＆＃39;的无效列名。如果我删除底部的WHERE子句，代码将按预期运行。不确定我做错了什么。

SELECT
    ROW_NUMBER() OVER(ORDER BY a.JobNo) AS [Row],
    a.JobNo,
    a.PartNo,
    a.WorkCntr,
    a.StepNo
FROM 
   (SELECT DISTINCT TOP 1000 r.JobNo,
                             r.PartNo,
                             r.WorkCntr,
                             r.StepNo
    FROM OrderRouting r 
    RIGHT JOIN Scheduling s ON r.JobNo = s.JobNo
    WHERE r.WorkCntr = 'Z-Straight'
    AND (r.Status = 'Current' OR r.Status = 'Pending' OR r.Status = 'Future')
    AND r.JobNo NOT LIKE '10415%'
    AND r.JobNo NOT LIKE '44444%'
    AND r.JobNo NOT LIKE '77777%'
    ORDER BY r.JobNo
    ) a
WHERE a.Row > 10

Answer 1

由于正在进行逻辑查询处理，尝试引用WHERE子句中的别名列不起作用。在WHERE子句之前评估SELECT。因此，在评估ROW时，列WHERE不存在。

在此示例中引用列的正确方法是：

 select * from (
    SELECT
    ROW_NUMBER() OVER(ORDER BY a.JobNo) AS [Row],
    a.JobNo,
    a.PartNo,
    a.WorkCntr,
    a.StepNo
    FROM 
    (
      SELECT DISTINCT 
      TOP 1000
      r.JobNo,
      r.PartNo,
      r.WorkCntr,
      r.StepNo
      FROM OrderRouting r RIGHT JOIN Scheduling s ON r.JobNo = s.JobNo
      WHERE r.WorkCntr = 'Z-Straight'
      AND (r.Status = 'Current'
      OR r.Status = 'Pending'
      OR r.Status = 'Future')
      AND r.JobNo NOT LIKE '10415%'
      AND r.JobNo NOT LIKE '44444%'
      AND r.JobNo NOT LIKE '77777%'
      ORDER BY r.JobNo
     ) a
    )b
    WHERE b.Row > 10

Answer 2

列＆＃39;行＆＃39;不属于子查询别名为＆＃39; a＆＃39;。此外，您无法使用别名＆＃39; Row＆＃39;因为SQL操作顺序而在where子句中。

我相信您可以将两个查询简化为cte：

with cte as(
SELECT DISTINCT 
TOP 1000
r.JobNo,
r.PartNo,
r.WorkCntr,
r.StepNo,
ROW_NUMBER() OVER(ORDER BY a.JobNo) AS [Row]
FROM OrderRouting r 
RIGHT JOIN Scheduling s ON r.JobNo = s.JobNo
WHERE r.WorkCntr = 'Z-Straight'
  AND (r.Status IN( 'Current','Pending','Future')
  AND r.JobNo NOT LIKE '10415%'
  AND r.JobNo NOT LIKE '44444%'
  AND r.JobNo NOT LIKE '77777%') 

SELECT *
FROM cte
WHERE Row > 10

为什么我不能用WHERE子句过滤我的行列

2 个答案: