Question

我有以下数据：

RecordYear TestA  TestB  TestC  TestD
2013        100   200    300    400
2014        150   250    350    450

我想要显示：

2013 TestType  Result  2014 Test Result
     TestA     100          TestA 150
     TestB     200          TestB 250
     TestC     300          TestC 350
     TestD     400          TestD 450

我已经使用了unpivot来获取部分路径，但我的查询最终得到：

2013
TestA  100
TestB  200
TestC  300
TestD  400

2014
TestA  150
TestB  250
TestC  350
TestD  450

我不知道如何移动2014年分组，以便它与2013年组相邻。任何帮助都会非常感激。

谢谢，

Answer 1

这将通过使用CTE执行枢轴然后在测试类型上自我加入来生成您想要的结果

WITH pv 
     AS (SELECT recordyear, 
                col, 
                val 
         FROM   table1 p 
                UNPIVOT (val 
                        FOR col IN (testa, 
                                    testb, 
                                    testc, 
                                    testd) ) AS unpvt) 
SELECT a.col [2013 TestType], 
       a.val [ Result ], 
       b.col [2014 TestType], 
       b.val [ Result] 
FROM   pv a 
       INNER JOIN pv b 
               ON a.col = b.col 
WHERE  a.recordyear = 2013 
       AND b.recordyear = 2014

DEMO

然而它确实有局限性

如果所采取的测试不同，您可能需要外部联接
如果您想要超过一年，将无法正常工作
列名称是硬编码以匹配where

Answer 2

你可以通过取UNION来做到这一点，并为每年的加入结果集保留一个Id 1-4。简单

    ;WITH CTE1 AS
    (
        SELECT 1 ID, RecordYear,'TESTA' TESTTYPE,TESTA Result FROM #TABLE WHERE RecordYear=2013
        UNION ALL
        SELECT 2 ID,RecordYear,'TESTB' TESTTYPE,TESTB Result  FROM #TABLE WHERE RecordYear=2013
        UNION ALL
        SELECT 3 ID,RecordYear,'TESTC' TESTTYPE,TESTC Result  FROM #TABLE WHERE RecordYear=2013
        UNION ALL
        SELECT 4 ID,RecordYear,'TESTD' TESTTYPE,TESTD Result  FROM #TABLE WHERE RecordYear=2013
    )
    ,CTE2 AS
    (
        SELECT 1 ID,RecordYear,'TESTA' TEST,TESTA Result  FROM #TABLE WHERE RecordYear=2014
        UNION ALL
        SELECT 2 ID,RecordYear,'TESTB' TEST,TESTB Result  FROM #TABLE WHERE RecordYear=2014
        UNION ALL
        SELECT 3 ID,RecordYear,'TESTC' TEST,TESTC Result  FROM #TABLE WHERE RecordYear=2014
        UNION ALL
        SELECT 4 ID,RecordYear,'TESTD' TEST,TESTD Result  FROM #TABLE WHERE RecordYear=2014
    )
    SELECT NULL '2013' ,CTE1.TESTTYPE,CTE1.Result,NULL '2014',CTE2.TEST,CTE2.Result 
    FROM CTE1
    JOIN CTE2 ON CTE1.ID=CTE2.ID

将行转换为sql server中的某些列

2 个答案: