#HY000View的SELECT包含FROM子句中的子查询

Question

我有一个sql请求，它在phpmyadmin中工作但是当我尝试制作Viev时出现错误：

HY000View的SELECT包含FROM子句

中的子查询

如何避免在FROM子句中使用子查询？这是sql：

Select tlb_all.BarCode As BarCode,
  Sum(tlb_all.TotalIncomes) As TotalIncomes,
  Sum(tlb_all.TotalOutcomes) As TotalOutcomes,
  Sum(tlb_all.TotalAdjustments) As TotalAdjustments,

  Sum(tlb_all.TotalIncomes - tlb_all.TotalOutcomes + tlb_all.TotalAdjustments)
  As Leftover
From (Select tlb1.BarCode As BarCode, Sum(IfNull(tlb1.Quantity,
      0)) As TotalIncomes, Sum(0) As TotalOutcomes, Sum(0) As TotalAdjustments
    From stock_incomes tlb1
    Group By tlb1.BarCode
    UNION
    Select tlb2.BarCode As BarCode, Sum(0) As TotalIncomes,
      Sum(IfNull(tlb2.Quantity, 0)) As TotalOutcomes, Sum(0) As
      TotalAdjustments
    From stock_outcomes tlb2
    Group By tlb2.BarCode
    UNION
    Select tlb3.BarCode As BarCode, Sum(0) As TotalIncomes,
      Sum(0) As TotalOutcomes, Sum(IfNull(tlb3.Adjustment,
      0)) As TotalAdjustments
    From stock_adjustments tlb3
    Group By tlb3.BarCode
    UNION
    Select tlb4.BarCode As BarCode, Sum(0) As TotalIncomes,
      Sum(0) As TotalOutcomes, Sum(0) As TotalAdjustments
    From stock_outcomes tlb4

    Group By tlb4.BarCode) As tlb_all
Group By tlb_all.BarCode
Having IsNull(tlb_all.BarCode) = FALSE And Leftover <> 0
Order By tlb_all.BarCode

Answer 1

如果你有一张包含所有可能代码的表，你可以这样做::

select bc.BarCode,
       (Select Sum(si.Quantity) From stock_incomes si where si.BarCode = bc.BarCode
       ) as TotalIncomes,
       . . .
from BarCodes bc

也就是说，将子查询移动到select子句（允许这些子句）。