Question

在第一个查询中，我使用LEFT JOIN返回月份，即使其中没有数据。但似乎它不起作用。

所以在第二个查询中，我决定使用RIGHT JOIN tblCalendar来返回没有数据的月份。但为什么每个月会有不同的结果？

;with cte_TopClasses AS 
( 
    select  
        b.YearNum,
        b.MonthNum,
        REPLACE(ClassCode,'+','') + ' - '+ QLL.Description as Description,
        SUM( Premium) as NetWrittenPremium
    from
        tblCalendar b  
    left join
        ProductionReportMetrics prm on b.MonthNum = Month(prm.EffectiveDate) 
                                    and b.YearNum = YEAR(EffectiveDate)     
                                    and prm.EffectiveDate >= DateAdd(yy, -1, DATEADD(d, 1, EOMONTH(GETDATE()))) 
                                    and prm.EffectiveDate <= EOMONTH(GETDATE())  
                                    and CompanyLine = 'Ironshore Insurance Company' 
                                    and LineOfCoverage NOT IN ('SSP Commercial General Liability', 'SSP Property')
    left join
        NetRate_Quote_Insur_Quote Q on prm.NetRate_QuoteID = Q.QuoteID
    left join
        NetRate_Quote_Insur_Quote_Locat QL ON Q.QuoteID = QL.QuoteID    
    LEFT JOIN   
        (SELECT * 
         FROM NetRate_Quote_Insur_Quote_Locat_Liabi nqI 
         JOIN 
             (SELECT LocationID as LocID, MAX(ClassCode) as ClCode 
              FROM NetRate_Quote_Insur_Quote_Locat_Liabi  
              GROUP BY LocationID) nqA ON nqA.LocID = nqI.LocationID AND nqA.ClCode = nqI.ClassCode ) QLL ON QLL.LocationID = QL.LocationID 
where
    (b.YearNum = YEAR(GETDATE()) - 1 and b.MonthNum >= MONTH(GETDATE()) + 1)
    or (b.YearNum = YEAR(GETDATE()) and b.MonthNum <= MONTH(GETDATE())) 
group by
    b.YearNum, b.MonthNum, ClassCode, QLL.Description
    ) 
    /*And this is that crazy final select statement from Richards (Stackoverflow) */
SELECT *
    FROM    (
            SELECT  RANK() OVER (ORDER BY [Description] DESC) AS Rank, * 
            FROM    cte_TopClasses
            WHERE   Description IN  (
                                    SELECT  [Description]
                                    FROM    (
                                            SELECT  RANK() OVER (ORDER BY SUM(NetWrittenPremium) DESC) AS [Rank], [Description], SUM(NetWrittenPremium) AS total
                                            FROM    cte_TopClasses
                                            WHERE [Description] IS NOT NULL
                                            GROUP BY [Description]
                                            ) BB
                                    WHERE [Rank] <= 10
                                    )
            ) AA
ORDER BY YearNum, MonthNum

在下一个查询中，我在最后tblCalendar语句中使用SELECT的第一个RIGHT JOIN tblCalendar语句中所做的全部内容基本上不是SELECT 在我将其转储到SSRS并按月分解后，由于某种原因它给出了不同的结果

    ;with cte_TopClasses
AS  ( 
select  
        YEAR(prm.EffectiveDate) as EffectiveYear,  --adding Effective because of SSRS repeating column and it gives me a shit
        MONTH(prm.EffectiveDate) as EffectiveMonthNum,  --adding Effective because of SSRS repeating column and it gives me a shit
        REPLACE(ClassCode,'+','') + ' - '+ QLL.Description as Description,
        SUM( Premium) as NetWrittenPremium
--FROM      tblCalendar b 
FROM         ProductionReportMetrics prm

--LEFT JOIN     ProductionReportMetrics prm ON b.MonthNum=Month(prm.EffectiveDate) AND b.YearNum = YEAR(EffectiveDate)  
--          AND prm.EffectiveDate >=DateAdd(yy, -1, DATEADD(d, 1, EOMONTH(GETDATE()))) AND prm.EffectiveDate <= EOMONTH(GETDATE())  AND CompanyLine = 'Ironshore Insurance Company' 
--          AND LineOfCoverage NOT IN ('SSP Commercial General Liability','SSP Property')
LEFT JOIN   NetRate_Quote_Insur_Quote Q ON prm.NetRate_QuoteID = Q.QuoteID 
            AND LineOfCoverage NOT IN ('SSP Commercial General Liability','SSP Property')
LEFT JOIN   NetRate_Quote_Insur_Quote_Locat QL ON Q.QuoteID = QL.QuoteID    

LEFT JOIN   (SELECT * FROM NetRate_Quote_Insur_Quote_Locat_Liabi nqI 
            JOIN ( SELECT LocationID as LocID, MAX(ClassCode) as ClCode 
            FROM NetRate_Quote_Insur_Quote_Locat_Liabi  GROUP BY LocationID ) nqA 
            ON nqA.LocID = nqI.LocationID AND nqA.ClCode = nqI.ClassCode ) QLL 
            ON QLL.LocationID = QL.LocationID 

--WHERE ( b.YearNum = YEAR(GETDATE())-1 and b.MonthNum >= MONTH(GETDATE())+1 ) OR 
--                  ( b.YearNum = YEAR(GETDATE()) and b.MonthNum <= MONTH(GETDATE()) ) 
GROUP BY    YEAR(prm.EffectiveDate) ,
            MONTH(prm.EffectiveDate), 
            ClassCode,      
            QLL.Description
    ) 
    /*And this is that crazy final select statement from Richards (Stackoverflow) */
SELECT Rank, b.YearNum,b.MonthNum, Description,NetWrittenPremium  
    FROM    (
            SELECT  RANK() OVER (ORDER BY [Description] DESC) AS Rank, * 
            FROM    cte_TopClasses
            WHERE   Description IN  (
                                    SELECT  [Description]
                                    FROM    (
                                            SELECT  RANK() OVER (ORDER BY SUM(NetWrittenPremium) DESC) AS [Rank], [Description], SUM(NetWrittenPremium) AS total
                                            FROM    cte_TopClasses
                                            WHERE [Description] IS NOT NULL
                                            GROUP BY [Description]
                                            ) BB
                                    WHERE [Rank] <= 10
                                    )
            ) AA RIGHT JOIN tblCalendar b ON b.YearNum = AA.EffectiveYear AND b.MonthNum=AA.EffectiveMonthNum 
            WHERE ( b.YearNum = YEAR(GETDATE())-1 and b.MonthNum >= MONTH(GETDATE())+1 ) OR 
                    ( b.YearNum = YEAR(GETDATE()) and b.MonthNum <= MONTH(GETDATE()) ) 

ORDER BY YearNum, MonthNum

一切都是一样的，直到部分以红色圈出。为什么会这样？

尝试＃1

    ;with cte_TopClasses
AS  ( 
select  
        YEAR(prm.EffectiveDate) as EffectiveYear, 
        MONTH(prm.EffectiveDate) as EffectiveMonthNum,  
        REPLACE(ClassCode,'+','') + ' - '+ QLL.Description as Description,
        SUM( Premium) as NetWrittenPremium

FROM         ProductionReportMetrics prm

LEFT JOIN   NetRate_Quote_Insur_Quote Q ON prm.NetRate_QuoteID = Q.QuoteID 
            AND LineOfCoverage NOT IN ('SSP Commercial General Liability','SSP Property')
LEFT JOIN   NetRate_Quote_Insur_Quote_Locat QL ON Q.QuoteID = QL.QuoteID    

LEFT JOIN   (SELECT * FROM NetRate_Quote_Insur_Quote_Locat_Liabi nqI 
            JOIN ( SELECT LocationID as LocID, MAX(ClassCode) as ClCode 
            FROM NetRate_Quote_Insur_Quote_Locat_Liabi  GROUP BY LocationID ) nqA 
            ON nqA.LocID = nqI.LocationID AND nqA.ClCode = nqI.ClassCode ) QLL 
            ON QLL.LocationID = QL.LocationID 
GROUP BY    YEAR(prm.EffectiveDate) ,
            MONTH(prm.EffectiveDate), 
            ClassCode,      
            QLL.Description
    ) 
SELECT TOP 10 Description, SUM(NetWrittenPremium) AS NetWrittenPremium, EffectiveYear,EffectiveMonthNum
FROM cte_TopClasses RIGHT JOIN tblCalendar b ON b.YearNum = EffectiveYear AND b.MonthNum=EffectiveMonthNum 
            WHERE ( b.YearNum = YEAR(GETDATE())-1 and b.MonthNum >= MONTH(GETDATE())+1 ) OR 
                    ( b.YearNum = YEAR(GETDATE()) and b.MonthNum <= MONTH(GETDATE()) ) 
GROUP BY [Description],EffectiveYear,EffectiveMonthNum
ORDER BY SUM(NetWrittenPremium) DESC

Answer 1

sql server中sum的前10个描述。

1）得到描述和总结：

SELECT [Description], SUM(NetWrittenPremium) AS total
FROM ct_TopClasses
GROUP BY [Description]

2）进入前10名

SELECT TOP 10 [Description], SUM(NetWrittenPremium) AS total
FROM ct_TopClasses
GROUP BY [Description]
ORDER BY SUM(NetWrittenPremium) DESC

这有点简单，是吗？

为什么我的查询返回略有不同的结果，即premium的SUM

1 个答案: