选择性聚合（GROUP BY 表中的特定行）

Question

我有一个表格，我需要在其中对选择性（特定行）的金额进行分组。

按资产名称将基金 RLWP、RLNP/UL 和 RL Estate 中的行分组为一行。

将 > RLWP、RLNP/UL 和 RL Estate 的基金编号字段重命名为 RP，但我不想在基金名称不在（> RLWP、RLNP/UL 和 RL Estate）的地方分组或求和

Asset Name     |Entity Code  |Total SII Amount |Fund Number 
------------------------------------------------------------
GSW 4.375%     |1020OB       |1317697.53       |RLWP
GSW 4.375%     |1020OB       |1191368.74       |RLNP/UL
GSW 4.375%     |1020OB       |289004.18        |RL Estate
GSW 4.375%     |1020OB       |232360.70        |UFOIB
GSW 4.375%     |1020OB       |10102.50         |ABG
UKT 0.375%     |1020OB       |5555.20          |ABG
UKT 0.375%     |1020OB       |702743.3518      |RLWP
UKT 0.375%     |1020OB       |546232.3383      |RL Estate

我有 2 或 3 种方法可以做到这一点，但您能否建议最有效的方法，因为这只是存储过程中同一张表上其他几个计算的一部分。

我想到的一种方法是

Select 
    [Asset Name],
    [Entity Code],
    sum([Total SII Amount])
where 
    fundnumber in (RLWP, [RLNP/UL], RL Estate)
group by 
    [Asset Name], [Entity Code],

union

Select 
    [Asset Name],
    [Entity Code],
where 
    fundnumber not in (RLWP, [RLNP/UL], RL Estate)

稍后将 (RLWP, [RLNP/UL] ,RL Estate) 的列名称更新为 RP。

我想到了使用 CTE 或 Cross Apply 但无法真正组成查询的其他方式。

请提出建议。

Answer 1

如果我理解正确，这可能是一个答案：

  SELECT [Asset Name],
         [Entity Code],
         SUM ([Total SII Amount]) [Total SII Amount],
         case  [Fund Number]
                when 'RLWP' then 'RP'
                when 'RLNP/UL' then 'RP'
                when 'RL Estate' then 'RP'
                else [Fund Number]
                end
            [Fund Number]
    FROM tab
GROUP BY [Asset Name],
         [Entity Code],
         case  [Fund Number]
                when 'RLWP' then 'RP'
                when 'RLNP/UL' then 'RP'
                when 'RL Estate' then 'RP'
                else [Fund Number]
                end

Answer 2

你问我一个例子，你在这里：只需粘贴到一个空的查询窗口并执行，适应你的需要......

DECLARE @Asset TABLE([Asset Name] VARCHAR(100),[Entity Code] VARCHAR(100), [Total SII Amount] DECIMAL(12,4),[Fund Number] VARCHAR(100) );
INSERT INTO @Asset VALUES
 ('GSW 4.375%','1020OB',1317697.53,'RLWP')
,('GSW 4.375%','1020OB',1191368.74,'RLNP/UL')
,('GSW 4.375%','1020OB',289004.18,'RL Estate')
,('GSW 4.375%','1020OB',232360.70,'UFOIB')
,('GSW 4.375%','1020OB',10102.50,'ABG')
,('UKT 0.375%','1020OB',5555.20,'ABG')
,('UKT 0.375%','1020OB',702743.3518,'RLWP')
,('UKT 0.375%','1020OB',546232.3383,'RL Estate');

--This comes back with all rows and a grouped sum at the end
WITH AssetsWithGroupedFundNumber AS
(
    SELECT *
          ,CASE [Fund Number]
                WHEN 'RLWP' THEN 'RP'
                WHEN 'RLNP/UL' THEN 'RP'
                WHEN 'RL Estate' THEN 'RP'
                ELSE [Fund Number]
           END AS FundNumberGrouped
    FROM @Asset
)
SELECT *
      ,SUM(a.[Total SII Amount]) OVER(PARTITION BY a.FundNumberGrouped) AS GroupSum
FROM AssetsWithGroupedFundNumber AS a;

--This comes back with a "normal" grouped sum
WITH AssetsWithGroupedFundNumber AS
(
    SELECT *
          ,CASE [Fund Number]
                WHEN 'RLWP' THEN 'RP'
                WHEN 'RLNP/UL' THEN 'RP'
                WHEN 'RL Estate' THEN 'RP'
                ELSE [Fund Number]
           END AS FundNumberGrouped
    FROM @Asset
)
SELECT a.FundNumberGrouped
      ,SUM(a.[Total SII Amount]) AS GroupSum
FROM AssetsWithGroupedFundNumber AS a
GROUP BY a.FundNumberGrouped