我正在使用SQL Server数据库并拥有以下表格
表"数据"
------------------
| Id | data_name |
------------------
| 1 |Data 1 |
| 2 |Data 2 |
| 3 |Data 3 |
| 4 |Data 4 |
| 5 |Data 5 |
------------------
和表" Value_data"
--------------------------------------------------------------------------------------------------------------
| Id | data_id | date | col_1_type | col_1_name | col_1_value | col_2_type | col_2_name | col_2_value |
--------------------------------------------------------------------------------------------------------------
| 1 | 1 | 2017-01-01 | A | Alpha | 12 | B | Beta | 23 |
| 2 | 1 | 2017-02-01 | A | Alpha | 32 | B | Beta | 42 |
---------------------------------------------------------------------------------------------------------------
我想做出如此结果
-----------------------------------------------------------------
|value_id | data_id | data_name | date | A-Alpha | B-Beta |
-----------------------------------------------------------------
|1 | 1 | Data 1 | 2017-01-01 | 12 | 23 |
|2 | 1 | Data 1 | 2017-02-01 | 32 | 42 |
-----------------------------------------------------------------
我已多次搜索解决方案,我尝试过使用Pivot作为静态结果,
DECLARE @Data TABLE ( Id INT, data_name VARCHAR(10) )
INSERT INTO @Data VALUES
( 1 ,'Data 1'),
( 2 ,'Data 2'),
( 3 ,'Data 3'),
( 4 ,'Data 4'),
( 5 ,'Data 5')
DECLARE @Value_data TABLE (Id INT, data_id INT, [date] DATE, col_1_type VARCHAR(10), col_1_name VARCHAR(10), col_1_value INT, col_2_type VARCHAR(10), col_2_name VARCHAR(10), col_2_value INT)
INSERT INTO @Value_data VALUES
( 1, 1, '2017-01-01','A','Alpha','12','B','Beta','23'),
( 2, 1, '2017-02-01','A','Alpha','32','B','Beta','42')
;WITH CTE AS (
select vd.Id value_id
, vd.data_id
, d.data_name
, vd.[date]
, vd.col_1_type + '-' +vd.col_1_name Col1
, vd.col_1_value
, vd.col_2_type + '-' +vd.col_2_name Col2
, vd.col_2_value
from @Value_data vd
inner join @Data d on vd.data_id = d.Id
)
SELECT * FROM CTE
PIVOT( MAX(col_1_value) FOR Col1 IN ([A-Alpha])) PVT_A
PIVOT( MAX(col_2_value) FOR Col2 IN ([B-Beta])) PVT_B
但它对我使用连接表的数据效果不佳,因为我的数据库是动态的,任何人都有相同案例的解决方案吗?