Getting one record per Emp_ID

join;oracle

I wrote a query whereby I joined multiple tables to get one row per employee id and the relevant information for each employee job code, job code etc

SELECT A.EMPLID, A.JOBCODE, A.JOBCODE_DESCR, A.EMPL_STATUS, A.LOCATION, A.LOCATION_DESCR, A.NAME, E.EMAILID, B.EMPLID, E.OPRID
  FROM PS_NPS_VIEW_ALL A, PS_PERSON_NAME B, PSOPRDEFN E
  WHERE ( A.EFFDT =
        (SELECT MAX(A_ED.EFFDT) FROM PS_NPS_VIEW_ALL A_ED
        WHERE A.EMPLID = A_ED.EMPLID
          AND A.EMPL_RCD = A_ED.EMPL_RCD
          AND A_ED.EFFDT <= SYSDATE)
    AND A.EFFSEQ =
        (SELECT MAX(A_ES.EFFSEQ) FROM PS_NPS_VIEW_ALL A_ES
        WHERE A.EMPLID = A_ES.EMPLID
          AND A.EMPL_RCD = A_ES.EMPL_RCD
          AND A.EFFDT = A_ES.EFFDT)
     AND A.EMPLID = B.EMPLID
     AND A.EMPLID = E.EMPLID
     AND A.PER_ORG = 'EMP'
     AND A.PAYGROUP NOT IN ('SUM','CWR'))

I wanted to get another field, JPM_DESCR90 into my query by joining the table PS_NPS_LIC_VW_RPT by EMPLID with one of my other tables in the original. I tried a left outer join between PS_PERSON_NAME B and PS_NPS_LIC_VW_RPT where by PS_PERSON_NAME B LEFT OUTER JOIN PS_NPS_LIC_VW_RPT C ON B.EMPLID = C.EMPLID

SELECT A.EMPLID, A.JOBCODE, A.JOBCODE_DESCR, A.EMPL_STATUS, A.LOCATION, A.LOCATION_DESCR, A.NAME, E.EMAILID, B.EMPLID, E.OPRID, C.JPM_DESCR90
  FROM PS_NPS_VIEW_ALL A, (PS_PERSON_NAME B LEFT OUTER JOIN  PS_NPS_LIC_VW_RPT C ON  B.EMPLID = C.EMPLID ), PSOPRDEFN E
  WHERE ( A.EFFDT =
        (SELECT MAX(A_ED.EFFDT) FROM PS_NPS_VIEW_ALL A_ED
        WHERE A.EMPLID = A_ED.EMPLID
          AND A.EMPL_RCD = A_ED.EMPL_RCD
          AND A_ED.EFFDT <= SYSDATE)
    AND A.EFFSEQ =
        (SELECT MAX(A_ES.EFFSEQ) FROM PS_NPS_VIEW_ALL A_ES
        WHERE A.EMPLID = A_ES.EMPLID
          AND A.EMPL_RCD = A_ES.EMPL_RCD
          AND A.EFFDT = A_ES.EFFDT)
     AND A.EMPLID = B.EMPLID
     AND A.EMPLID = E.EMPLID
     AND A.PER_ORG = 'EMP'
     AND A.PAYGROUP NOT IN ('SUM','CWR')

However I got multiple rows for each EMPLID since JPM_DESCR90 has multiple values for each EMPLID in PS_NPS_LIC_VW_RPT C .

I also tried a standard join between the two whereby B.EMPLID = C.EMPLID between
PS_PERSON_NAME B, and PS_NPS_LIC_VW_RPT C

SELECT A.EMPLID, A.JOBCODE, A.JOBCODE_DESCR, A.EMPL_STATUS, A.LOCATION, A.LOCATION_DESCR, A.NAME, E.EMAILID, B.EMPLID, E.OPRID, C.JPM_DESCR90
  FROM PS_NPS_VIEW_ALL A, PS_PERSON_NAME B, PSOPRDEFN E, PS_NPS_LIC_VW_RPT C
  WHERE ( A.EFFDT =
        (SELECT MAX(A_ED.EFFDT) FROM PS_NPS_VIEW_ALL A_ED
        WHERE A.EMPLID = A_ED.EMPLID
          AND A.EMPL_RCD = A_ED.EMPL_RCD
          AND A_ED.EFFDT <= SYSDATE)
    AND A.EFFSEQ =
        (SELECT MAX(A_ES.EFFSEQ) FROM PS_NPS_VIEW_ALL A_ES
        WHERE A.EMPLID = A_ES.EMPLID
          AND A.EMPL_RCD = A_ES.EMPL_RCD
          AND A.EFFDT = A_ES.EFFDT)
     AND A.EMPLID = B.EMPLID
     AND A.EMPLID = E.EMPLID
     AND A.PER_ORG = 'EMP'
     AND A.PAYGROUP NOT IN ('SUM','CWR')
     AND B.EMPLID = C.EMPLID)

I'm tried to get JPM_DESCR90 from PS_NPS_LIC_VW_RPT into my original query so that I can get one value per EMPLID .I know that its probably a simple solution but would appreciate some help

Best Answer

I was able to solve my problem by adding the completion dates for JPM_DESCR90 (which is a field decription/name for certifications) in my query i.e. and then looked for max values of those dates in my query by adding MAX( TO_CHAR(C.JPM_DATE_3,'YYYY-MM-DD')) to the SELECT statement. This gives me the most recently acquired certification for each employee. I have attached a snapshot of my result as a jpeg image above

SELECT A.EMPLID, A.JOBCODE, A.JOBCODE_DESCR, A.EMPL_STATUS, A.LOCATION, A.LOCATION_DESCR, A.NAME, E.EMAILID, B.EMPLID, E.OPRID, MAX( TO_CHAR(C.JPM_DATE_3,'YYYY-MM-DD'))
  FROM PS_NPS_VIEW_ALL A, (PS_PERSON_NAME B LEFT OUTER JOIN  PS_NPS_LIC_VW_RPT C ON  B.EMPLID = C.EMPLID ), PSOPRDEFN E
  WHERE ( A.EFFDT =
        (SELECT MAX(A_ED.EFFDT) FROM PS_NPS_VIEW_ALL A_ED
        WHERE A.EMPLID = A_ED.EMPLID
          AND A.EMPL_RCD = A_ED.EMPL_RCD
          AND A_ED.EFFDT <= SYSDATE)
    AND A.EFFSEQ =
        (SELECT MAX(A_ES.EFFSEQ) FROM PS_NPS_VIEW_ALL A_ES
        WHERE A.EMPLID = A_ES.EMPLID
          AND A.EMPL_RCD = A_ES.EMPL_RCD
          AND A.EFFDT = A_ES.EFFDT)
     AND A.EMPLID = B.EMPLID
     AND A.EMPLID = E.EMPLID
     AND A.PER_ORG = 'EMP'
     AND A.EMPL_STATUS='A'
     AND A.PAYGROUP NOT IN ('SUM','CWR'))
  GROUP BY  A.EMPLID,  A.JOBCODE,  A.JOBCODE_DESCR,  A.EMPL_STATUS,  A.LOCATION,  A.LOCATION_DESCR,  A.NAME,  E.EMAILID,  B.EMPLID,  E.OPRID

However, I have one more question. Is there a way to get all the certifications(JPM_DESCR90 aka Jobcodedescr column( in one row rather than in multiple rows for by getting each value of JPM_DESCR90 separated by ':' character for each employee irrespective of certification completion dates (C.JPM_DATE_3) ?

Related Solutions

Sql-server – Why is this Full Outer Join not working

You should do an isnull on both policynumbers so that you can group properly.

Since it's an outer-join, there's the possibility of one side of the join being NULL while still having data.

select sum(premium) Prem_Sum, sum(Loss) Loss_Sum, isnull(t1.policynumber, t2.policynumber)
from t1 full outer join t2 on t1.policynumber = t2.policynumber
group by isnull(t1.policynumber, t2.policynumber)

Sql-server – SQL join query to show rows with non-existent rows in one table

Thank you for SQLfiddle and sample data! I wish more questions started this way.

If you want all members regardless of whether they have an entry for that date, you want a LEFT OUTER JOIN. You were very close with this version however a little trick with outer joins is that if you add a filter to the outer table in the WHERE clause, you turn an outer join to an inner join, because it will exclude any rows that are NULL on that side (because it doesn't know if NULL would match the filter or not).

I modified the first query to get a row for every member:

SELECT Members.Member_ID
      ,Time_Entry.Date_Start
      ,Time_Entry.Hours_Actual
      ,Time_Entry.Hours_Bill
FROM dbo.Members
  LEFT OUTER JOIN dbo.Time_Entry
--^^^^ changed from FULL to LEFT
  ON Members.Member_ID = Time_Entry.Member_ID
  AND Time_Entry.Date_Start = '20131110';
--^^^ changed from WHERE to AND

I'll leave it as an exercise for the reader to take it from there and add the other columns, formatting, COALESCE etc.

Some other notes:

please always use the schema prefix when creating and referencing objects
please always use a length when converting to varchar etc.
stay away from ambiguous, regional date formats like mm-dd-yyyy

consider using aliases to make your queries easier to read. E.g. the above could be re-written as:

SELECT m.Member_ID
  ,t.Date_Start
  ,t.Hours_Actual
  ,t.Hours_Bill
FROM dbo.Members AS m
LEFT OUTER JOIN dbo.Time_Entry AS t
ON m.Member_ID = t.Member_ID
AND t.Date_Start = '20131110';

... a lot tidier, IMHO, as long as you use sensible aliases.

Best Answer

Related Solutions

Sql-server – Why is this Full Outer Join not working

Sql-server – SQL join query to show rows with non-existent rows in one table

Related Question