MySQL查询使用检索值if语句

select 
     IFNULL(sum(invoice0_.INV_AMT),0) as col_0_0_,IFNULL(sum(invoice1_.INV_AMT),0) as col_0_0_ 
    from 
     hrmanager.invoice invoice0_, 
     hrmanager.invoice invoice1_ 
    where 
     invoice0_.FROM_LEDGER=1 
     **or** invoice1_.TO_LEDGER=1 
     and (
      invoice0_.INV_DATE between '1900-12-20' and '2012-01-30' 
     ) 
     and invoice0_.ACTIVE='Y' 
     and invoice0_.COMP_ID=2 
     and invoice1_.COMP_ID=2 
     and invoice0_.INV_TYPE='CLIENT' 
     and invoice1_.INV_TYPE='CLIENT';

在这里，我要选择所有from_ledger = 1和下一列的量的总和应显示所有to_ledger = 1的量的总和，但这里给了和/或在条件检索相同的数据，在Db这里从分类帐= 1然后结果是7000和toledger = 1然后它将0但上述查询检索两列是相同的值，如0或7000MySQL查询使用检索值if语句

来源

2012-01-18 Rafeek Muhammed

它看起来像您的查询有点混乱。您正在从同一个表执行两次查询，但没有会导致笛卡尔结果的JOIN条件。我认为你要找的是你的表“发票”有两列......“To_Ledger”和“From_Ledger”，“INV_AMT”和其他一些标准领域......这应该让你更接近你的答案。

select 
     sum(if(inv.From_Ledger = 1, inv.Inv_Amt, 0)) as FromInvoiceAmounts, 
     sum(if(inv.To_Ledger = 1, inv.Inv_Amt, 0)) as ToInvoiceAmounts 
    from 
     hrmanager.invoice inv 
    where 
      1 in (inv.From_Ledger, inv.To_Ledger) 
     AND inv.inv_date between '1900-12-20' and '2012-01-30' 
     and inv.Active = 'Y' 
     and inv.Comp_ID = 2 
     and inv.Inv_Type = 'CLIENT'

来源

2012-01-19 14:01:10 DRapp

MySQL查询使用检索值if语句

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