sql - 取消嵌套嵌套的 SQL 查询
问题描述
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正常工作的查询。问题是我需要在使用 ExecuteScalar 函数的报告中使用它,并且不允许嵌套查询,我尝试使用连接重建,但我似乎迷路了。
谁能帮我“取消嵌套”这个查询?
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。谢谢
解决方案
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'
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