Duplication issue with left join only by adding one column - sql

Question

So I apologize for the wall of code, but I'm losing my mind over this tiny issue that is kicking my butt. The below query works perfectly and gives me everything I need to see with the exception of one column from DB.ACTIVITY_T. The moment I add said column, I immediately get duplicates where there is a MNT.ARRIVEDTS present. I can't seem to figure out why adding one more column to my select statement is causing this duplication. Maybe I'm too deep into this to see what's right in front of me? If you see what could be causing the error, please feel free to enlighten me.
SELECT
TRIM(B.REFNUMBER) AS "REFNUMBER"
,DATE(NUM_TSTAMP) AS "P/U DATE"
,CASE WHEN DATE(REPORT_TS) IS NULL THEN '' ELSE CHAR(DATE(REPORT_TS)) END AS "DELIVERY DATE"
,CASE WHEN REPORT_TS IS NULL THEN 'N' ELSE 'Y' END AS "DELIVERED"
,B.WEIGHT AS "WGT"
,B.PIECES
,B.WANT_DATE
,CEIL(B.CUBE) AS "SHPMNT CUBE"
,CASE WHEN B.DESTINATION = '5647' THEN 'DERPO'
WHEN B.DESTINATION = '1234' THEN 'DERPB'
WHEN B.DESTINATION = '9856' THEN 'DERPC'
ELSE ''
END AS "DERP POINT"
,CASE WHEN R.REFNO IS NULL THEN '' ELSE CHAR(R.REFNO) END AS "DERP #"
,CASE WHEN C.CITY = 'DERPSTON' THEN 'BLAH'
WHEN C.CITY = 'DERPELVANIA' THEN 'HABD'
WHEN C.CITY = 'DERPVILLE' THEN 'POIN'
ELSE ''
END AS "SEQUENCE"
,CASE WHEN E.EVENT_DESCRIPTION = 'ABCD' THEN 'Y'
ELSE 'N'
END AS "DERP DERP"
,DATE(E.EVENT_TIMESTAMP) AS "DERP DATE"
,TIME(E.EVENT_TIMESTAMP) AS "DERP TIME"
,CASE WHEN I.DOC_TYPE = 'DERPI' THEN 'Y'
ELSE 'N'
END AS "DERP
,CASE WHEN B.CUBE > '0.5' THEN 'Y' ELSE 'N' END AS "DERP CUBE”
,MNT."DERP ARRIVED"
FROM PQ.MAIN B
INNER JOIN PQ.MAIN_ALTERNATE A
ON B.REFNUMBER = A.REFNUMBER
AND B.CORRECTION = A.CORRECTION
AND A.NUMBER_KEY = ''
INNER JOIN PQ.MAIN_NAME C
ON C.REFNUMBER = B.REFNUMBER
AND C.CORRECTION = B.CORRECTION
AND C.TYPE = 'C'
AND C.NUMBER_KEY = ''
AND C.NUM_CODE = 'ABCD'
INNER JOIN PQ.MAIN_NAME S
ON B.REFNUMBER = S.REFNUMBER
AND B.CORRECTION = S.CORRECTION
AND S.TYPE = 'S'
AND S.COUNTRY = 'US'
AND S.NUMBER_KEY = ''
LEFT OUTER JOIN DB.ACTIVITY_NUM MN
ON MN.REFNUMBER = B.REFNUMBER
LEFT OUTER JOIN (SELECT MAX(DATE(A.ARRIVEDTS)) AS "DERP ARRIVED", MFSTNBR
FROM AF.MANIFEST_T A WHERE A.DESTINATION IN ('1234','5647') GROUP BY MFSTNBR) AS MNT
ON MNT.MFSTNBR = MN.MFSTNBR
LEFT OUTER JOIN PQ.MAIN_EVENT E
ON E.REFNUMBER = B.REFNUMBER
AND E.EVENT_TYPE = 'R'
AND E.EVENT_DESCRIPTION = 'RANDO'
AND E.NUMBER_KEY = ''
LEFT OUTER JOIN DB.DERP_INDEX I
ON B.REFNUMBER = I.REFNUMBER
AND I.DOC_TYPE = 'LIE'
AND PAGE_NUM = '1'
AND I.INDEX_DATE >= CURRENT DATE - 15 DAYS
LEFT OUTER JOIN PQ.MAIN_REFNO R
ON R.REFNUMBER = B.REFNUMBER
AND R.CORRECTION = B.CORRECTION
AND REFNO LIKE '%BOOG%'
AND R.NUMBER_KEY = ''
WHERE B.NUM_NUM_NUM = '123'
AND B.DESTINATION IN ('1234','5647','9856')
AND DATE(B.NUM_TSTAMP) >= CURRENT DATE - 10 DAYS
GROUP BY
TRIM(B.REFNUMBER)
,DATE(NUM_TSTAMP)
,CASE WHEN DATE(REPORT_TS) IS NULL THEN '' ELSE CHAR(DATE(REPORT_TS)) END
,CASE WHEN REPORT_TS IS NULL THEN 'N' ELSE 'Y' END
,B.WEIGHT
,B.PIECES
,B.WANT_DATE
,CEIL(B.CUBE)
,CASE WHEN B.DESTINATION = '5647' THEN 'DERPO'
WHEN B.DESTINATION = '1234' THEN 'DERPB'
WHEN B.DESTINATION = '9856' THEN 'DERPC'
ELSE ''
END
,CASE WHEN R.REFNO IS NULL THEN '' ELSE CHAR(R.REFNO)
,CASE WHEN C.CITY = 'DERPSTON' THEN 'BLAH'
WHEN C.CITY = 'DERPELVANIA' THEN 'HABD'
WHEN C.CITY = 'DERPVILLE' THEN 'POIN'
ELSE ''
END
,CASE WHEN E.EVENT_DESCRIPTION = 'ABCD' THEN 'Y'
ELSE 'N'
END
,DATE(E.EVENT_TIMESTAMP)
,TIME(E.EVENT_TIMESTAMP)
,CASE WHEN I.DOC_TYPE = 'DERPI' THEN 'Y'
ELSE 'N'
END
,CASE WHEN B.CUBE > '0.5' THEN 'Y' ELSE 'N' END
,MNT."DERP ARRIVED"
Here are the results that you asked for.
REFNUMBER DERP ARRIVED MFSTNBR
123456789 [null] [null]
123456789 [null] [null]
123456789 2015-12-15 32304587
987654321 [null] [null]
987654321 [null] [null]
987654321 2015-12-13 49304483
Each null actually has a different MFSTNBR tied to it, but it's returning a null because it doesn't meet the '1234' or '5647' criteria. If I remove the destination criteria the nulls would be replaced with similar but different MFSTNBR.

Answer 1

My guess is you're getting multiple records from MNT when you only want one...
Likely MNT.Destination having 2 different values will result in 2 records for the max, not one.
Replace the
LEFT OUTER JOIN DB.ACTIVITY_T MNT
with
(SELECT MAX(DATE(MNT.ARRIVEDTS)) as "DERP ARRIVED", MFSTNBR
FROM DB.Activity_T
WHERE MNT.DESTINATION IN ('1234','5647')
GROUP BY MFSTNBR) as MNT
and eliminate the join critiera;
ND MNT.DESTINATION IN ('1234','5647') as it's taken care of by the inline view.
oh and modify the select to just look for "DERP ARRIVED" on the top most select.
Just my guess...
SELECT
TRIM(B.REFNUMBER) AS "REFNUMBER"
,DATE(NUM_TSTAMP) AS "P/U DATE"
,CASE WHEN DATE(REPORT_TS) IS NULL THEN '' ELSE CHAR(DATE(REPORT_TS)) END AS "DELIVERY DATE"
,CASE WHEN REPORT_TS IS NULL THEN 'N' ELSE 'Y' END AS "DELIVERED"
,B.WEIGHT AS "WGT"
,B.PIECES
,B.WANT_DATE
,CEIL(B.CUBE) AS "SHPMNT CUBE"
,CASE WHEN B.DESTINATION = '5647' THEN 'DERPO'
WHEN B.DESTINATION = '1234' THEN 'DERPB'
WHEN B.DESTINATION = '9856' THEN 'DERPC'
ELSE ''
END AS "DERP POINT"
,CASE WHEN R.REFNO IS NULL THEN '' ELSE CHAR(R.REFNO) END AS "DERP #"
,CASE WHEN C.CITY = 'DERPSTON' THEN 'BLAH'
WHEN C.CITY = 'DERPELVANIA' THEN 'HABD'
WHEN C.CITY = 'DERPVILLE' THEN 'POIN'
ELSE ''
END AS "SEQUENCE"
,CASE WHEN E.EVENT_DESCRIPTION = 'ABCD' THEN 'Y'
ELSE 'N'
END AS "DERP DERP"
,DATE(E.EVENT_TIMESTAMP) AS "DERP DATE"
,TIME(E.EVENT_TIMESTAMP) AS "DERP TIME"
,CASE WHEN I.DOC_TYPE = 'DERPI' THEN 'Y'
ELSE 'N'
END AS "DERP
,CASE WHEN B.CUBE > '0.5' THEN 'Y' ELSE 'N' END AS "DERP CUBE”
-------Modified the next line--------------
,MNT."DERP ARRIVED"
FROM PQ.MAIN B
INNER JOIN PQ.MAIN_ALTERNATE A
ON B.REFNUMBER = A.REFNUMBER
AND B.CORRECTION = A.CORRECTION
AND A.NUMBER_KEY = ''
INNER JOIN PQ.MAIN_NAME C
ON C.REFNUMBER = B.REFNUMBER
AND C.CORRECTION = B.CORRECTION
AND C.TYPE = 'C'
AND C.NUMBER_KEY = ''
AND C.NUM_CODE = 'ABCD'
INNER JOIN PQ.MAIN_NAME S
ON B.REFNUMBER = S.REFNUMBER
AND B.CORRECTION = S.CORRECTION
AND S.TYPE = 'S'
AND S.COUNTRY = 'US'
AND S.NUMBER_KEY = ''
LEFT OUTER JOIN DB.ACTIVITY_NUM MN
ON MN.REFNUMBER = B.REFNUMBER
-------Modified the next line--------------
LEFT OUTER JOIN (SELECT MAX(DATE(A.ARRIVEDTS)) as "DERP ARRIVED", MFSTNBR
FROM DB.Activity_T A
WHERE A.DESTINATION IN ('1234','5647')
GROUP BY MFSTNBR) as MNT
ON MNT.MFSTNBR = MN.MFSTNBR
-------Removed this line. the next line--------------
---and MNT.DESTINATION IN ('1234','5647') -------
LEFT OUTER JOIN PQ.MAIN_EVENT E
ON E.REFNUMBER = B.REFNUMBER
AND E.EVENT_TYPE = 'R'
AND E.EVENT_DESCRIPTION = 'RANDO'
AND E.NUMBER_KEY = ''
LEFT OUTER JOIN DB.DERP_INDEX I
ON B.REFNUMBER = I.REFNUMBER
AND I.DOC_TYPE = 'LIE'
AND PAGE_NUM = '1'
AND I.INDEX_DATE >= CURRENT DATE - 15 DAYS
LEFT OUTER JOIN PQ.MAIN_REFNO R
ON R.REFNUMBER = B.REFNUMBER
AND R.CORRECTION = B.CORRECTION
AND REFNO LIKE '%BOOG%'
AND R.NUMBER_KEY = ''
WHERE B.NUM_NUM_NUM = '123'
AND B.DESTINATION IN ('1234','5647','9856')
AND DATE(B.NUM_TSTAMP) >= CURRENT DATE - 10 DAYS
GROUP BY
TRIM(B.REFNUMBER)
,DATE(NUM_TSTAMP)
,REPORT_TS
,REPORT_TS
,B.WEIGHT
,B.PIECES
,B.WANT_DATE
,CEIL(B.CUBE)
,B.DESTINATION
,R.REFNO
,C.CITY
,E.EVENT_DESCRIPTION
,DATE(E.EVENT_TIMESTAMP)
,TIME(E.EVENT_TIMESTAMP)
,I.DOC_TYPE
,B.CUBE
--- Added this line----
,MNT."DERP ARRIVED"