没有汇总的SQL Pivot数据

Question

我有一个结构如下的表：

ID | Type | PrimaryInd | SecondaryInd | TertiaryInd
---------------------------------------------------
12 | Boat |     0      |      1       |     0  
12 | Auto |     1      |      1       |     1
12 | Home |     1      |      0       |     1

我正在尝试将每个ID的结果排成一行，如下所示：

ID | BoatPrimaryInd | BoatSecondaryInd | BoatTertiaryInd | AutoPrimaryInd | ...
-------------------------------------------------------------------------------
12 |       0        |        1         |        0        |       1        | ...

我目前使用CASE和GROUP BY来像这样设置查询：

SELECT 
   ID,
   MIN(CASE WHEN Type = 'Boat' THEN PrimaryInd+0 END) AS BoatPrimaryInd,
   ...
FROM Table
GROUP BY ID

这是最有效的方法吗？我尝试查看了PIVOT表，但是由于我在这里没有任何汇总信息，因此我不确定这是我需要的东西。

Answer 1

您可以与CROSS APPLY一起使用PIVOT

示例

Select *
 From  (
        Select A.ID
              ,B.*
         From  YourTable A
         Cross Apply ( values (concat([Type],'PrimaryInd')  ,[PrimaryInd]  )
                             ,(concat([Type],'SecondaryInd'),[SecondaryInd])
                             ,(concat([Type],'TertiaryInd') ,[TertiaryInd] )
                     )B(Item,Value)
        ) src
 Pivot (max(Value) for Item in (
                                [BoatPrimaryInd],
                                [BoatSecondaryInd],
                                [BoatTertiaryInd],
                                [AutoPrimaryInd],
                                [AutoSecondaryInd],
                                [AutoTertiaryInd],
                                [HomePrimaryInd],
                                [HomeSecondaryInd],
                                [HomeTertiaryInd]
                                ) ) pvt 

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