T-SQL : 열 값을 행 값으로 옮깁니다.

Question

사례 명세서 (또는 제안한 내용)에 여러 결과가 나타나고 여러 결과가 출력에 반영되도록하고 싶습니다. 그러나 하단의 예제를 사용하여 원하는 결과를 얻지 못합니다. 미리 감사드립니다.

ID Phase Total Hours Team1 Team2 Team3 
1 Test  50  25  10 15 
2 QA  60  20  20 20 
3 Impl  40  0  20 20 

찾고 : :

현재

ID Phase Total Hours Team Name Team Hour 
1 Test  50  Team 1  25 
1 Test  50  Team 2  10 
1 Test  50  Team 3  15 
2 QA  60  Team 1  20 
2 QA  60  Team 2  20 
2 QA  60  Team 3  20 
3 Impl  40  Team 2  20 
3 Impl  40  Team 3  20 



Select ID, Phase, Total Hours, 
case 
When Team1 is not null and Team1 is >0 then 'Team1' 
When Team2 is not null and Team2 is >0 then 'Team2' 
When Team3 is not null and Team3 is >0 then 'Team3' 
end as 'Team Name', 

case 
When Team1.Hrs is not null and Team1.Hrs is >0 then Team1.Hrs 
When Team2.Hrs is not null and Team2.Hrs is >0 then Team2.Hrs 
When Team3.Hrs is not null and Team3.Hrs is >0 then Team3.Hrs 
end as 'Team Hours' 

From DB.DBNAME 

Answer 1

미운하지만 ...

SELECT ID, Phase, [Total Hours], 'Team1' AS Team, Team1 AS [Team Hours] 
FROM DB.DBNAME 

UNION 

SELECT ID, Phase, [Total Hours], 'Team2' AS Team, Team2 AS [Team Hours] 
FROM DB.DBNAME 

UNION 

SELECT ID, Phase, [Total Hours], 'Team3' AS Team, Team3 AS [Team Hours] 
FROM DB.DBNAME 

이 같은 반환하는 쿼리가 필요한 이유, 그리고 모를 수가 정기적 인 쿼리를 수행하고 클라이언트 측 데이터를 재 배열합니까?

Answer 2

UNPIVOT을 사용하십시오. 예 :

;WITH t AS(
SELECT * FROM (VALUES(1,'Test',50,25,10,15),(2,'QA',60,20,20,20),(3,'Impl',40,0,20,20) 
      )x(ID, Phase, [Total Hours], Team1, Team2, Team3) 
) 
SELECT ID,Phase, [Total Hours], [Team Name], [Team Hour] 
FROM t 
UNPIVOT 
    ([Team Hour] FOR [Team Name] IN (Team1, Team2, Team3)) AS unpvt 
WHERE [Team Hour] > 0