데이터베이스 질문과 답변
DB에 상기와 같은 데이터가 있습니다.
| AA | BB | EE | FF | A |
| 1011 | 핸드폰 | 1010 | N | 0 |
| 1012 | 전화기 | 1011 | N | 50 |
| 1018 | 노트북 | 1012 | Y | 10 |
| 1049 | 케이스 | 1012 | Y | 10 |
| 1087 | 컴퓨터 | 1012 | Y | 10 |
| 1139 | 선풍기 | 1012 | Y | 10 |
| 1168 | 테블릿 | 1012 | Y | 10 |
SELECT AA,BB,EE,FF,
CASE WHEN FF = 'N' THEN
(SELECT SUM(A) FROM RESULT_TEST WHERE EE = Z.AA)
ELSE A END AS
A
FROM RESULT_TEST Z
ORDER BY AA ASC
이렇게 하면 전화기 금액은 집계가 되는데 핸드폰 금액까지 어떻게 집계를 하죠.
이게 원하는 결과 입니다. select 했을 때
| AA | BB | EE | FF | A |
| 1011 | 핸드폰 | 1010 | N | 50 |
| 1012 | 전화기 | 1011 | N | 50 |
| 1018 | 노트북 | 1012 | Y | 10 |
| 1049 | 케이스 | 1012 | Y | 10 |
| 1087 | 컴퓨터 | 1012 | Y | 10 |
| 1139 | 선풍기 | 1012 | Y | 10 |
| 1168 | 테블릿 | 1012 | Y | 10 |
-- Oracle --
WITH t AS
(
SELECT 1011 cd, '핸드폰' nm, 1010 pcd, 'N' yn, 0 v FROM dual
UNION ALL SELECT 1012, '전화기', 1011, 'N', 0 FROM dual
UNION ALL SELECT 1018, '노트북', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1049, '케이스', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1087, '컴퓨터', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1139, '선풍기', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1168, '테블릿', 1012, 'Y', 10 FROM dual
)
SELECT cd, nm, pcd, yn
, (SELECT SUM(v)
FROM t
START WITH cd = m.cd
CONNECT BY PRIOR cd = pcd
) v
FROM t m
;
-- http://gurubee.net/lecture/2250
WITH t AS
(
SELECT 1011 cd, '핸드폰' nm, 1010 pcd, 'N' yn, 0 v FROM dual
UNION ALL SELECT 1012, '전화기', 1011, 'N', 0 FROM dual
UNION ALL SELECT 1018, '노트북', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1049, '케이스', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1087, '컴퓨터', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1139, '선풍기', 1012, 'Y', 10 FROM dual
UNION ALL SELECT 1168, '테블릿', 1012, 'Y', 10 FROM dual
)
SELECT cd, nm, pcd, yn
, (SELECT SUM(v)
FROM t
START WITH cd = m.cd (cd 에러 발생 현재 MSSQL 2005 버전 입니다.)
CONNECT BY PRIOR cd = pcd
) v
FROM t m
;
-- MSSQL --
WITH t AS
(
SELECT 1011 cd, '핸드폰' nm, 1010 pcd, 'N' yn, 0 v
UNION ALL SELECT 1012, '전화기', 1011, 'N', 0
UNION ALL SELECT 1018, '노트북', 1012, 'Y', 10
UNION ALL SELECT 1049, '케이스', 1012, 'Y', 10
UNION ALL SELECT 1087, '컴퓨터', 1012, 'Y', 10
UNION ALL SELECT 1139, '선풍기', 1012, 'Y', 10
UNION ALL SELECT 1168, '테블릿', 1012, 'Y', 10
)
, t1 AS
(
SELECT cd root_cd
, cd
, v
FROM t
UNION ALL
SELECT p.root_cd
, c.cd
, c.v
FROM t1 p
INNER JOIN t c
ON p.cd = c.pcd
)
SELECT a.cd
, a.nm
, a.pcd
, a.yn
, b.v
FROM t a
INNER JOIN
(SELECT root_cd
, SUM(v) v
FROM t1
GROUP BY root_cd
) b
ON a.cd = b.root_cd
;
감사합니다. ^^
) 버튼을 클릭하여 작성 하시면 됩니다.