group by, distinct not working as expected

Question

group by, distinct not working as expected

mattech06

SSCrazy

Points: 2484
More actions
January 2, 2014 at 4:14 am

#287773

Hi,
I have this sql....
SELECT
dbPatID, dbAddDate, dbStaffLastName, RefTypeWord
FROM
EPSReferralKPIs
WHERE
(dbAddDate >= '2013-01-01' OR '2013-01-01' = '')
AND (dbAddDate <= '2013-12-31' OR '2013-12-31' = '')
AND (dbStaffLastName IN ('Swanepoel','Patient','Pelletti','Ray','Qureshi','Grobler','Hedborg','De Kock','Lima','Check In','Hodgson')
AND (RefTypeWord IN ('PATIENT','OTHER','DOCTOR','','SIBLING')
ORDER BY
dbAddDate
There may be more than one RefTypeWord for a dbPatId however I only want the result set to bring back unique dbPatID's and not more than one row containing a different RefTypeWord per row.
Is that possible?
thanks,

Viewing 6 posts - 1 through 5 (of 5 total)

You must be logged in to reply to this topic. Login to reply

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 1

What about the other columns? Can you show a few rows of what you have and what you would like to see? Remember - we can't see what you can, we're relying upon your description.

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

mattech06 SSCrazy Points: 2484 More actions · Answer 2

The current sql will bring back

900032592013-05-28 16:05:13.000GroblerDOCTOR

900032592013-05-28 16:05:13.000GroblerOTHER

Where as I want it to bring back just one row for each dbPatID, I'm not bothered which RefTypeWord it is

thanks

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 3

Try this as a test:

SELECT

dbPatID,

dbAddDate,

dbStaffLastName,

RefTypeWord = MAX(RefTypeWord)

FROM EPSReferralKPIs

WHERE

dbAddDate >= '2013-01-01' OR '2013-01-01' = ''

AND dbAddDate <= '2013-12-31' OR '2013-12-31' = ''

AND dbStaffLastName IN ('Swanepoel','Patient','Pelletti','Ray','Qureshi','Grobler','Hedborg','De Kock','Lima','Check In','Hodgson')

AND RefTypeWord IN ('PATIENT','OTHER','DOCTOR','','SIBLING')

GROUP BY dbPatID, dbAddDate, dbStaffLastName

ORDER BY dbAddDate

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

mattech06 SSCrazy Points: 2484 More actions · Answer 4

Thanks, I've actually worked out we don't need to select the RefTypeWord, so removing this from the select and making dbPatID distinct bought back the correct amount of rows.

I compared this with your sql and it brings the same result set back which is good.

thanks for your help.

ChrisM@Work SSC Guru Points: 186127 More actions · Answer 5

Just a thought...what's this meant to do?

(dbAddDate >= '2013-01-01' OR '2013-01-01' = '')

AND (dbAddDate <= '2013-12-31' OR '2013-12-31' = '')

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden