Sql 多个案例陈述的最小值

使用SSMS 2012，但使用SQL Server 2000

我有一个查询，其中有4列是通过冗长的case语句计算出来的。我需要再添加一列，显示这4列中的最小值。在最终形式中，只要最后一列的值最小，则不需要在结果中保留4列。下面是我目前使用的代码和一个结果示例。在结果样本中，我已经包括了我想要的最后一层列。我也是SQL新手，因此如果有更干净的方法来完成同样的任务，请随时教我。：）

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我不确定这是否最好用子查询、嵌套大小写或我甚至不知道存在的东西来完成。

我不认为您的方法有什么问题，但也许最好在应用程序级别而不是在查询中处理此类问题。

首先，将查询转换为视图。

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首先，在视图上创建一个新的查询，其中字段已经计算完毕，您可以相互比较这些字段。

您使用的是哪种RDM？我对sql非常陌生，所以我不太清楚您所说的RDM是什么意思，但我想您想知道我正在使用T-sql。好的，我会用谷歌搜索视图是什么以及如何使用它。：）我同意这一点，但是大老板说不，他想在质询中加入。

Select 
,Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) as ADT
,Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) as AMT
,Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
  Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2) as ADL
,Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
  Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2) as AML

,case 
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 3500 and 1000000 then '1'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 2000 and 3499.99 then '2'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 1500 and 1999.99 then '3'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 1000 and 1499.99 then '4'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 750  and 999.99  then '5'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 500  and 749.99  then '6'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 300  and 499.99  then '7'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 150  and 299.99  then '8'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 75   and 149.99  then '9'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 40   and 74.99   then '10'
    when Round(Sum(S.TWin)/Nullif(Count(Distinct S.GamingDate),0),2) between 15   and 39.99   then '11'
    Else null
End as "ADT Tier"
,case
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 21000 and 1000000 then '1'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 12000 and 20999   then '2'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 9000  and 11999   then '3'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 6000  and 8999    then '4'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 4500  and 5999    then '5'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 3000  and 4499    then '6'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 1800  and 2999    then '7'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 900   and 1799    then '8'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 450   and 899     then '9'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 240   and 349     then '10'
    when Round(Sum(S.Twin)/Nullif(count(Distinct Month(S.GamingDate)),0),2) between 90    and 239     then '11'
    Else null
End as "AMT Tier"
,case
    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 3500 and 1000000 then '1'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 2000 and 3499.99 then '2'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 1500 and 1999.99 then '3'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 1000 and 1499.99 then '4'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 750  and 999.99  then '5'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 500  and 749.99  then '6'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 300  and 499.99  then '7'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 150  and 299.99  then '8'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 75   and 149.99  then '9'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 40   and 74.99   then '10'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/Count(Distinct S.GamingDate)),2)
         between 15   and 39.99   then '11'

    Else null
End as "ADL Tier"
,case
    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 21000 and 1000000 then '1'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 12000 and 20999   then '2'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 9000  and 11999   then '3'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 6000  and 8999    then '4'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 4500  and 5999    then '5'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 3000  and 4499    then '6'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 1800  and 2999    then '7'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 900   and 1799    then '8'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 450   and 899     then '9'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 240   and 349     then '10'

    when Round(((Sum(case when S.StatType = 'Slot' then S.CashIn - S.CashOut - S.JackPot Else 0 end)+
         Sum(case when S.StatType = 'Pit' then S.CashIn + S.ChipsIn + S.FrontIn + S.CreditIn - S.CashOut Else 0 end))/count(Distinct Month(S.GamingDate))),2)
         between 90    and 239     then '11'

    Else null
End as "AML Tier"

From  dbo.CDS_STATDAY as S

Where S.GamingDate Between '06/1/2014' and '08/31/2014'
  And S.IDType = 'P'
  And S.StatType <> 'Poker'

Group by S.Meta_ID

Player ID    ADT     AMT      ADL     AML      ADT Tier    AMT Tier    ADL Tier    AML Tier    Final Tier
114          498.26  4484.31  394.99  3554.90  7           6           7           6             6
144          59.42   257.50   61.46   266.34   10          10          10          10           10
316          0.29    0.29     -13.1   -13.1    NULL        NULL        NULL        NULL         NULL
573          3.09    6.18     60      120      NULL        NULL        10          11           10