问题
I am struggling with a query that tried few days back with a suggestion of one of SO user and got it work with the following:
WITH your_table(ID,STOREDATE,VALUE,INFO)
AS
(
SELECT 1122,'1/1/2020',2,'DONE' UNION ALL
SELECT 1122,'1/2/2020',1,'DONE' UNION ALL
SELECT 1122,'1/3/2020',7,'DONE' UNION ALL
SELECT 1122,'1/4/2020',8,'DONE'
),
CTE AS
(
SELECT ID,
STOREDATE,
VALUE,
CASE
WHEN VALUE = 8 THEN 0
WHEN VALUE + LAG(VALUE) OVER(ORDER BY STOREDATE) = 8 THEN 0
WHEN VALUE + LEAD(VALUE) OVER(ORDER BY STOREDATE) = 8 THEN 0
ELSE VALUE
END VALUE2,
INFO
FROM your_table
)
SELECT *,
CASE
WHEN
(
SELECT COUNT(*) FROM CTE A
WHERE A.VALUE2 = 0 AND A.STOREDATE < B.STOREDATE
) >= 1 AND B.VALUE = 8 THEN B.VALUE
ELSE B.VALUE2
END VALUE3
FROM CTE B
N.B: My idea was to get the summation of 8 at any given row. So for the above input, my expected output is this.
Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 0 //1 + 7 = 8; it'll update both the rows with zero
1122 1/3/2020 0 //For this, it's just fine
1122 1/4/2020 8 DONE
Now my problem is with the below inputs that I can't figure out how to get expected result set.
Input:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 1 DONE
1122 1/3/2020 2 DONE
1122 1/4/2020 7 DONE
Expected Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 0
1122 1/3/2020 2 DONE
1122 1/4/2020 0
Input:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 2 DONE
1122 1/3/2020 2 DONE
1122 1/4/2020 2 DONE
Expected Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 0
1122 1/2/2020 0
1122 1/3/2020 0
1122 1/4/2020 0
I may have several ids to get the exact result as below but making tweaks to the query doesn't get me to what I wanted. Any suggestion would be appreciated - Thanks.
WITH your_table(ID,STOREDATE,VALUE,INFO)
AS
(
SELECT 1122,'1/1/2020',2,'DONE' UNION ALL
SELECT 1122,'1/2/2020',7,'DONE' UNION ALL
SELECT 1122,'1/3/2020',1,'DONE' UNION ALL
SELECT 1122,'1/4/2020',8,'DONE' UNION ALL
SELECT 4466,'1/1/2020',2,'DONE' UNION ALL
SELECT 4466,'1/2/2020',7,'DONE' UNION ALL
SELECT 4466,'1/3/2020',1,'DONE' UNION ALL
SELECT 4466,'1/4/2020',8,'DONE'
),
CTE AS
(
SELECT ID,
STOREDATE,
VALUE,
CASE
WHEN VALUE = 8 THEN 0
WHEN VALUE + LAG(VALUE) OVER(ORDER BY STOREDATE) = 8 THEN 0
WHEN VALUE + LEAD(VALUE) OVER(ORDER BY STOREDATE) = 8 THEN 0
ELSE VALUE
END VALUE2,
INFO
FROM your_table
)
SELECT *,
CASE
WHEN
(
SELECT COUNT(*) FROM CTE A
WHERE A.VALUE2 = 0 AND A.STOREDATE < B.STOREDATE
) >= 1 AND B.VALUE = 8 THEN B.VALUE
ELSE B.VALUE2
END VALUE3
FROM CTE B
Expected Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 0
1122 1/3/2020 0
1122 1/4/2020 8 DONE
4466 1/1/2020 2 DONE
4466 1/2/2020 0
4466 1/3/2020 0
4466 1/4/2020 8 DONE
Update 1: Please check the below
Input:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 1 DONE
1122 1/3/2020 2 DONE
1122 1/4/2020 7 DONE
Expected Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 0
1122 1/3/2020 2 DONE
1122 1/4/2020 0
Input:
ID STOREDATE VALUE INFO
1122 1/1/2020 2 DONE
1122 1/2/2020 2 DONE
1122 1/3/2020 2 DONE
1122 1/4/2020 2 DONE
Expected Output:
ID STOREDATE VALUE INFO
1122 1/1/2020 0
1122 1/2/2020 0
1122 1/3/2020 0
1122 1/4/2020 0
回答1:
Your first big mistake is that 'stordate' is not a date, but a character string representation of a date. Thus, all comparisons will be comparisons of a string, not a date. As a string, which comes first, '01/02/2020' or '02/01/2019'.
WITH your_table(ID,STOREDATE,VALUE,INFO)
AS
(
SELECT 1122,to_date('01/01/2020','dd/mm/yyyy'),2,'DONE' UNION ALL
SELECT 1122,to_date('01/02/2020','dd/mm/yyyy'),1,'DONE' UNION ALL
SELECT 1122,to_date('01/03/2020','dd/mm/yyyy'),7,'DONE' UNION ALL
SELECT 1122,to_date('01/04/2020','dd/mm/yyyy'),8,'DONE'
),
回答2:
Can you please check this bellow solution-
DEMO HERE
DEMO2 HERE
WITH your_table(ID,STOREDATE,VALUE,INFO)
AS
(
SELECT 1122,'1/1/2020',2,'DONE' UNION ALL
SELECT 1122,'1/2/2020',7,'DONE' UNION ALL -- This two returns zero
SELECT 1122,'1/3/2020',1,'DONE' UNION ALL -- As 1 and 7 have sum of 8; it should check once I mean the sum
SELECT 1122,'1/4/2020',7,'DONE' UNION ALL -- Unfortunately this returns zero as well
SELECT 4466,'1/1/2020',2,'DONE' UNION ALL
SELECT 4466,'1/2/2020',7,'DONE' UNION ALL
SELECT 4466,'1/3/2020',1,'DONE' UNION ALL
SELECT 4466,'1/4/2020',8,'DONE'
),
CTE AS
(
SELECT ID,
STOREDATE,
VALUE,
CASE
WHEN VALUE = 8 THEN 0
WHEN VALUE + LAG(VALUE) OVER(ORDER BY ID, STOREDATE) = 8
AND ID = LAG(ID) OVER(ORDER BY ID, STOREDATE) THEN 0
WHEN VALUE + LEAD(VALUE) OVER(ORDER BY ID, STOREDATE) = 8
AND ID = LEAD(ID) OVER(ORDER BY ID, STOREDATE) THEN 0
ELSE VALUE
END VALUE2,
INFO
FROM your_table
)
SELECT *,
CASE
WHEN
(
SELECT COUNT(*) FROM CTE A
WHERE A.VALUE2 = 0 AND A.STOREDATE < B.STOREDATE
AND A.ID = B.ID
) >= 1 AND B.VALUE = 8 THEN B.VALUE
WHEN
(
SELECT SUM(A.VALUE)
FROM CTE A
WHERE A.VALUE2 = 0
AND A.STOREDATE < B.STOREDATE
AND A.ID = B.ID
)>= 8 THEN B.VALUE
ELSE B.VALUE2
END VALUE3
FROM CTE B
来源：https://stackoverflow.com/questions/60905844/query-result-not-returned-as-expected