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Inner join select results in double query return, all rows are double ... !!!

Posted on 2004-10-12
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Last Modified: 2008-02-01
When this query is executed it returns all rows two times right after each other... why ?

select fromdate as startDate,toDate as endDate,jc.recid as vacation_id,'' as text,ja.description as type,1 as accepted,ltrim(emplID) as employee_initials from AXSQL.AXDBTEST.DBO.JMGABSENCECALENDAR as jc inner join AXSQL.AXDBTEST.DBO.JMGIPCACTIVITY as ja on ja.JOBID=jc.JOBID  where ltrim(EMPLID)='CHK'
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Question by:mSchmidt
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LVL 2

Expert Comment

by:praveen_ms
ID: 12285380
Looks like you have duplicate records try running this

select DISTINCT fromdate as startDate,
toDate as endDate,
jc.recid as vacation_id,
'' as text,
ja.description as type,
1 as accepted,
ltrim(emplID) as employee_initials
from AXSQL.AXDBTEST.DBO.JMGABSENCECALENDAR as jc
inner join AXSQL.AXDBTEST.DBO.JMGIPCACTIVITY as ja on ja.JOBID=jc.JOBID
where ltrim(EMPLID)='CHK'
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Assisted Solution

by:praveen_ms
praveen_ms earned 1000 total points
ID: 12285400
If you are expecting only one row to be returned with out distinct just make sure that you don't have two job ID's in any of these tables to verify that

you can run

select count(ja.JOBID), ja.JOBID
from AXSQL.AXDBTEST.DBO.JMGIPCACTIVITY as ja
GROUP BY ja.JOBID
HAVING count(ja.JOBID)>1

and similary repeat on the other table. If you see any records with count more than 1 then this job id should be duplicated.
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Accepted Solution

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etmendz earned 1000 total points
ID: 12285402
Maybe the relationship is one-to-many and there are already two activity entries per calendar entry? Better yet, check your activity table. It may have double entries for all activities in the first place.
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LVL 6

Expert Comment

by:etmendz
ID: 12285412
In fact, maybe your calendar contains duplicates :-)

Have fun...
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Author Comment

by:mSchmidt
ID: 12285700
It did have double entries, dah, chose to use Distinct to only get one result.. thanks guys
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