[英]Oracle SQL how to write complex query with multiple joins and groupby
Oracle SQL : I have the below set of queries, all fetching from same table. Oracle SQL:我有以下一组查询,全部从同一个表中获取。 I wanted to find if there is a way if it all can be combined into one query ?
我想知道是否有办法将所有内容合并为一个查询?
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
T.G_SECTOR
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.G_SECTOR
ORDER BY 1 DESC
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
T.AGENCY_NAME,T.DIST_AGENCY_TYPE
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.AGENCY_NAME, T.DIST_AGENCY_TYPE
ORDER BY 1 DESC
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
T.VIOLATION_ENGLISH,T.DIST_AGENCY_TYPE
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.VIOLATION_ENGLISH, T.DIST_AGENCY_TYPE
ORDER BY 1 DESC
SELECT *
FROM (
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
T.G_SECTOR, '' AS AGENCY_NAME, '' AS VIOLATION_ENGLISH, '' AS DIST_AGENCY_TYPE
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.G_SECTOR
UNION ALL
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
'' AS G_SECTOR, T.AGENCY_NAME, '' AS VIOLATION_ENGLISH, T.DIST_AGENCY_TYPE
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.AGENCY_NAME, T.DIST_AGENCY_TYPE
UNION ALL
SELECT COUNT(T.ISSUE_NUMBER) total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) total_rejected,
'' AS G_SECTOR, '' AS AGENCY_NAME, T.VIOLATION_ENGLISH,T.DIST_AGENCY_TYPE
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center'
AND TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30
AND T.IS_DISTORTION = 1
GROUP BY T.VIOLATION_ENGLISH, T.DIST_AGENCY_TYPE
) A
ORDER BY 1 DESC
Yes, Oracle has advanced mechanisms for grouping data: ROLLUP, CUBE, GROUPING Functions and GROUPING SETS .是的,Oracle 具有用于分组数据的高级机制: ROLLUP、CUBE、GROUPING Functions 和 GROUPING SETS 。 In your case grouping sets seems promising.
在您的情况下,分组集似乎很有希望。
This is my table:这是我的表:
create table t(a, b, c, d, e, f) as (
select 'A1', 'B1', 'C1', 'D1', 'E1', 701 from dual union all
select 'A2', 'B1', 'C2', 'D1', 'E2', 702 from dual union all
select 'A2', 'B1', 'C2', 'D1', 'E3', 703 from dual );
You queries differs only in group by
part, and you are naturally selecting different columns which are bases of groups.您的查询仅在
group by
部分group by
有所不同,并且您自然会选择作为组基础的不同列。 where
conditions and conditional counts are not important. where
条件和条件计数并不重要。 Your selects looks like:您的选择看起来像:
select a, count(1) from t group by a;
select b, c, count(1) from t group by b, c;
select d, e, count(1) from t group by d, e;
You can do this:你可以这样做:
select a, b, c, d, e, grouping_id(a, b, c, d, e) grp_id, count(1) cnt
from t
group by grouping sets( (a, null), (b, c), (d, e) )
which outputs:输出:
A B C D E GRP_ID CNT
-- -- -- -- -- ---------- ----------
A1 15 1
A2 15 2
B1 C1 19 1
B1 C2 19 2
D1 E1 28 1
D1 E2 28 1
D1 E3 28 1
GROUPING SETS
should do what you want: GROUPING SETS
应该做你想做的:
SELECT T.G_SECTOR, T.AGENCY_NAME, T.DIST_AGENCY_TYPE,
T.VIOLATION_ENGLISH, T.DIST_AGENCY_TYPE,
COUNT(T.ISSUE_NUMBER) as total_cases,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Closed' THEN 1 END) as total_close,
COUNT(CASE WHEN T.DIST_COMPLETED_STATUS = 'Open' THEN 1 END) as total_open,
COUNT(CASE WHEN T.IS_DUPLICATE = 1 THEN 1 END) as total_duplicate,
COUNT(CASE WHEN T.IS_REJECTION = 1 THEN 1 END) as total_rejected
FROM TRANSFORMED T
WHERE T.SERVICE_CENTER_ENGLISH = 'Center' AND
TO_DATE(T.RAISED_ON) >= TRUNC(SYSDATE)-30 AND
T.IS_DISTORTION = 1
GROUP BY GROUPING SETS ( (T.G_SECTOR),
(T.AGENCY_NAME, T.DIST_AGENCY_TYPE),
(T.VIOLATION_ENGLISH, T.DIST_AGENCY_TYPE)
)
ORDER BY total_cases DESC;
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