Question

我是构建SQL查询的新手，可以使用一些帮助。我构建了一个可以作为独立查询工作的查询。问题是我需要在使用ExecuteScalar函数的报表中使用它并且不允许嵌套查询，我尝试使用连接重建但我似乎丢失了。

任何人都可以帮我“解除”这个查询吗？

SELECT
StockType2Job.Loaded
FROM
  StockType2Job
WHERE
  StockType2Job.IdStockType = 
  (SELECT StockType.IdStockType
  FROM StockType
  WHERE StockType.Number = '1001716.00')
AND
  StockType2Job.IdStockType2JobGroup =
  (SELECT StockType2JobGroup.IdStockType2JobGroup
  FROM StockType2JobGroup
  WHERE StockType2JobGroup.IdJob =
          (SELECT Job.IdJob
          FROM Job
          WHERE Job.Number = '18-0085.02'
          AND StockType2JobGroup.Caption = 'Breakout Room 1'))

任何帮助表示赞赏。感谢

Answer 1

此查询应该有效（在Oracle DB上）：

SELECT
   StockType2Job.Loaded
FROM
   (((StockType2Job a JOIN StockType b ON a.IdStockType=b.IdStockType) 
      JOIN StockType2JobGroup c ON a.IdStockType2JobGroup=c.IdStockType2JobGroup)
        JOIN Job d ON c.IdJob=d.IdJob)
WHERE
   b.Number = '1001716.00' AND 
   d.Number = '18-0085.02' AND
   c.Caption = 'Breakout Room 1'

取消嵌套嵌套SQL查询

1 个答案: