Group By Issue in Select Query in SQL - sql

Question

I am kind of stuck in one of the SQL queries where I would require little help.
Table structure is as follow:
Table #1: PROD_ORDER:
ID_PROD_ORDER(PK)
1001
1002
1003
Table #2: JOB
ID_JOB | ID_PROD_ORDER(FK)|ID_ASSET | DT_START | DT_END
1 1001 8 2016/11/22 05:45:50 2016/11/24 13:13:14
2 1001 8 some date some date
3 1002 9 some date some date
4 1002 9 some date some date
5 1003 8 some date some date
6 1001 8 some date some date
Table #3: Confirmation
ID_CONFIRMATION | ID_JOB | QT_CONF | QT_SCRAP
Table #4: DOWNTIME
ID_DOWNTIME | DT_START | DT_END | ID_ORG_SUB_ASSET
Now the requirement is to find order and
Start date of the order (which will be Min of DT_START from JOB)
End date of the order (which will be Max of DT_END from JOB)
Sum of all of its jobs' QT_CONF
Sum of all of its jobs' QT_SCRAP
Downtime from DOWNTIME table where downtime = Difference in seconds of DT_START - DT_END
ID_ASSET, Start Date and End Date will be passed in as parameters.
I have written this query:
SELECT
PO.ID_PROD_ORDER,
J.ID_ORG_ASSET,
SUM(C.QT_CONF) AS "QT_CONF",
SUM(C.QT_SCRAP) AS "QT_SCRAP",
MIN(J.DT_JOB_ST) AS "START_DATE",
MAX(J.DT_JOB_ED) AS "END_DATE",
(SELECT SUM(datediff(ss, D.DT_START, D.DT_END)) AS "DOWNTIMESECONDS"
FROM DOWNTIME D
INNER JOIN SUB_ASSET SA ON D.ID_SUB_ASSET = SA.ID_SUB_ASSET
WHERE SA.ID_ASSET = [Param.3] AND D.DT_START >= J.DT_JOB_ST
AND D.DT_END <= J.DT_JOB_ED)
FROM
PROD_ORDER PO
INNER JOIN
JOB J ON PO.ID_PROD_ORDER = J.ID_PROD_ORDER
AND J.DT_JOB_ST >= '[Param.1]'
AND J.DT_JOB_ED <= '[Param.2]'
LEFT OUTER JOIN
CONFIRMATION C ON C.ID_JOB = J.ID_JOB
WHERE
J.ID_ASSET = [Param.3]
GROUP BY
PO.ID_PROD_ORDER, J.ID_ASSET
The query throws an error:
JOB.DT_JOB_ST cannot be included in select list as it is not used in aggregation or GROUP BY
If I put JOB.DT_JOB_ST and JOB.DT_JOB_ED in GROUP BY, then it returns more than 1 row for each order but I need only one row per order.
How can I correct it? I'm just confused !!
Thanks !

Answer 1

I suspect the issue here is the correlated query, which will try to evaluate for each row - as this includes the DT_JOB_ST and DT_JOB_ED it would need these to be part of the group.
The other option would be to rewrite to not need the correlated query, so something like this should be good for you:
SELECT PO.ID_PROD_ORDER,
J.ID_ORG_ASSET,
SUM(C.QT_CONF) AS [QT_CONF],
SUM(C.QT_SCRAP) AS [QT_SCRAP],
MIN(J.DT_JOB_ST) AS [START_DATE],
MAX(J.DT_JOB_ED) AS [END_DATE],
SUM(ISNULL(datediff(ss, D.DT_START, D.DT_END),0)) AS [DOWNTIMESECONDS]
FROM PROD_ORDER PO
INNER JOIN JOB J
ON PO.ID_PROD_ORDER = J.ID_PROD_ORDER
AND J.DT_JOB_ST >= '[Param.1]'
AND J.DT_JOB_ED <= '[Param.2]'
LEFT JOIN CONFIRMATION C
ON C.ID_JOB = J.ID_JOB
LEFT JOIN DOWNTIME D
INNER JOIN SUB_ASSET SA
ON D.ID_SUB_ASSET = SA.ID_SUB_ASSET
AND SA.ID_ASSET = [Param.3]
ON D.DT_START >= J.DT_JOB_ST
AND D.DT_END <= J.DT_JOB_ED
WHERE J.ID_ASSET = [Param.3]
GROUP BY PO.ID_PROD_ORDER, J.ID_ORG_ASSET
(if you prefer, a CTE could work, too)

Answer 2

Following query worked :
SELECT
PO.ID_PROD_ORDER,
J.ID_ASSET,
SUM(C.QT_CONF) AS "QT_CONF",
SUM(C.QT_SCRAP) AS "QT_SCRAP",
MIN(J.DT_JOB_ST) AS "START_DATE",
MAX(J.DT_JOB_ED) AS "END_DATE",
(SELECT SUM(datediff(ss, D.DT_START, D.DT_END)) AS "DOWNTIMESECONDS"
FROM DOWNTIME D
INNER JOIN SUB_ASSET SA ON D.ID_SUB_ASSET = SA.ID_SUB_ASSET
WHERE SA.ID_ASSET = [Param.3] AND D.DT_START >= MIN(J.DT_JOB_ST)
AND D.DT_END <= MAX(J.DT_JOB_ED))
FROM
PROD_ORDER PO
INNER JOIN
JOB J ON PO.ID_PROD_ORDER = J.ID_PROD_ORDER
AND J.DT_JOB_ST >= '[Param.1]'
AND J.DT_JOB_ED <= '[Param.2]'
LEFT OUTER JOIN
CONFIRMATION C ON C.ID_JOB = J.ID_JOB
WHERE
J.ID_ASSET = [Param.3]
GROUP BY
PO.ID_PROD_ORDER, J.ID_ASSET