从 sql 汇总中的小计/总计中删除空值答案

【问题标题】：Remove nulls from sub totals / grand totals in tsql rollup从 sql 汇总中的小计/总计中删除空值
【发布时间】：2012-09-12 14:12:23
【问题描述】：

我目前有一个脚本，它使用汇总来聚合一些数据：

SELECT 
        CASE 
            WHEN GROUPING(Custodian) = 1 
                THEN 'Grand Total'
            WHEN GROUPING(PortfolioID) = 1
                THEN Custodian+''+'Total'
            ELSE Custodian

        END AS Custodian

    ,   PortfolioID
    ,   PortfolioBaseCCY
    ,   [Date]
    ,   SUM(AmountTotalBaseEquiv) AS AmountTotalBaseEquiv
    ,   ExchangeRate
    ,   AmountTotalBaseEquivUSD
    ,   PortfolioNAVUSD
    ,   SUM(TotalCashPctNAV) AS TotalCashPctNAV 

FROM @ResultSet
WHERE TotalCashPctNAV > 5
GROUP BY Custodian
    ,   PortfolioID
    ,   PortfolioBaseCCY
    ,   [Date]
    ,   AmountTotalBaseEquiv
    ,   ExchangeRate
    ,   AmountTotalBaseEquivUSD
    ,   PortfolioNAVUSD 
    ,   TotalCashPctNAV WITH ROLLUP

HAVING GROUPING_ID(Custodian
    ,   PortfolioID
    ,   PortfolioBaseCCY
    ,   [Date]
    ,   AmountTotalBaseEquiv
    ,   ExchangeRate
    ,   AmountTotalBaseEquivUSD
    ,   PortfolioNAVUSD 
    ,   TotalCashPctNAV) IN (1,255,511)

ORDER BY CASE WHEN GROUPING(Custodian) = 1 THEN 2 ELSE 1 END, Custodian, TotalCashPctNAV DESC, PortfolioID

这会返回数据，例如：

Custodian   PortfolioID PortfolioBaseCCY Date         AmountTotalBaseEquiv  ExchangeRate    AmountTotalBaseEquivUSD PortfolioNAVUSD TotalCashPctNAV
XXXX        TEST        USD              11/09/2012   85708860.21           1               85708860.21             370253861.3     23.15
XXXX  Total NULL        NULL             NULL         85708860.21           NULL            NULL                    NULL            23.15
ZZZZ        TEST1       GBP              11/09/2012   48427.91              0.6225          77795.84                77795.84        100
ZZZZ        TEST2       GBP              11/09/2012   7772.61               0.6225          12486.12                12486.12        100
ZZZZ        TEST3       USD              11/09/2012   1832627.81            1               1832627.81              17343500.68     10.56
ZZZZ  Total NULL        NULL             NULL         1888828.33            NULL            NULL                    NULL            210.56
Grand Total NULL        NULL             NULL         310273031.4           NULL            NULL                    NULL            1051.71

我希望 NULLS 变为 '' 以便只有 Total 标签和两个总和是该特定行上唯一的数据位，这可能吗？

【问题讨论】：

标签： tsql null rollup

【解决方案1】：

您可以使用 SQL 中的 ISNull() 函数将 NULL 替换为空格，如下所示：

SELECT 
    CASE 
        WHEN GROUPING(Custodian) = 1 
            THEN 'Grand Total'
        WHEN GROUPING(PortfolioID) = 1
            THEN Custodian+''+'Total'
        ELSE Custodian

    END AS Custodian

,   isNUll(PortfolioID,'')
,   isNull(PortfolioBaseCCY,'')
,   isNull([Date],'')
,   SUM(AmountTotalBaseEquiv) AS AmountTotalBaseEquiv
,   isNull(ExchangeRate,'')
,   isNull(AmountTotalBaseEquivUSD,'')
,   isNull(PortfolioNAVUSD,'')
,   SUM(TotalCashPctNAV) AS TotalCashPctNAV

【讨论】：

【解决方案2】：

如果您可以接受 NULL 值在数据行和总行中都显示为空字符串，您可以将所有非字符串列转换为字符串并使用 COALESCE（或 ISNULL），例如：

SELECT  
        CASE  
            WHEN GROUPING(Custodian) = 1  
                THEN 'Grand Total' 
            WHEN GROUPING(PortfolioID) = 1 
                THEN Custodian+' '+'Total' 
            ELSE Custodian 

        END AS Custodian 

    ,   COALESCE(PortfolioID,'') AS PortfolioID
    ,   COALESCE(PortfolioBaseCCY,'') AS  PortfolioBaseCCY
    ,   COALESCE(CONVERT(char(10),[Date],101),'') AS [Date]
    ,   SUM(AmountTotalBaseEquiv) AS AmountTotalBaseEquiv 
    ,   COALESCE(CONVERT(char(10),ExchangeRate),'') AS ExchangeRate
    ,   COALESCE(CONVERT(char(20),AmountTotalBaseEquivUSD),'') AS AmountTotalBaseEquivUSD
    ,   COALESCE(CONVERT(char(20),PortfolioNAVUSD),'') AS PortfolioNAVUSD
    ,   SUM(TotalCashPctNAV) AS TotalCashPctNAV

FROM @ResultSet 
WHERE TotalCashPctNAV > 5 
GROUP BY Custodian 
    ,   PortfolioID 
    ,   PortfolioBaseCCY 
    ,   [Date] 
    ,   AmountTotalBaseEquiv 
    ,   ExchangeRate 
    ,   AmountTotalBaseEquivUSD 
    ,   PortfolioNAVUSD  
    ,   TotalCashPctNAV WITH ROLLUP 

HAVING GROUPING_ID(Custodian 
    ,   PortfolioID 
    ,   PortfolioBaseCCY 
    ,   [Date] 
    ,   AmountTotalBaseEquiv 
    ,   ExchangeRate 
    ,   AmountTotalBaseEquivUSD 
    ,   PortfolioNAVUSD  
    ,   TotalCashPctNAV) IN (1,255,511) 

ORDER BY CASE WHEN GROUPING(Custodian) = 1 THEN 2 ELSE 1 END, Custodian, TotalCashPctNAV

否则，您可以像使用 Custodian 一样使用大小写表达式来确定哪些行是总计。例如：

CASE WHEN GROUPING(Custodian) + GROUPING(PortfolioId) > 0 THEN '' 
     ELSE PortfolioID END AS PortfolioID

【讨论】：

这很好用，谢谢。我遵循了 COALESCE 的方式，因为我们永远不会在无总记录上出现空值。感谢您的帮助