assist'ce with 'ORDER BY' clause

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November 21st, 2003, 04:47 PM

ratumeli

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assist'ce with 'ORDER BY' clause

how can I list the various PERFORMERS which have the same CONCERTDATE AND CONCERTVENUE. So pretty much PERFORMERS performing at the same location on the same day.

SQL> desc futureconcerts;
Name Null? Type
----------------------------------------- -------- -------------
CONCERTID NOT NULL NUMBER
CONCERTVENUE VARCHAR2(20)
CONCERTDATE DATE
PERFORMERS VARCHAR2(3)

November 21st, 2003, 05:09 PM

shammat

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select concertdate, concertvenue, performers
from futureconcerts
order by 1,2;

This is so damn easy that I'm sure I missed something in your question...

November 21st, 2003, 05:43 PM

ratumeli

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That what I did too but is not correct. Lemme see if i can explain it better.

I need to pull out performers who are going to perform at the same venue on any particular/given date. so date and venue's in common of performers...and to only list exactly that.

Table data:

CONCERTVENUE CONCERTDATE PERFID
-------------------- --------------- -------
va2 23/NOV/03 p25
va21 22/NOV/03 p25
va21 22/NOV/03 p27
va21 22/NOV/03 p26
va22 22/NOV/03 p10
va24 24/NOV/03 p25
va29 25/NOV/03 p25
va30 28/NOV/03 p35
va30 28/NOV/03 p35
va30 28/NOV/03 p45
va30 28/NOV/03 p46

-------------------------------------------------------------------

Desired Outcome:
va21 22/NOV/03 p25
va21 22/NOV/03 p27
va21 22/NOV/03 p26
va30 28/NOV/03 p35
va30 28/NOV/03 p35
va30 28/NOV/03 p45
va30 28/NOV/03 p46

Last edited by ratumeli : November 21st, 2003 at 05:49 PM.

November 21st, 2003, 06:40 PM

shafique

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My guess is:

SELECT CONCERTVENUE, CONCERTDATE, PERFORMERS
FROM FUTURECONCERTS, (select CONCERTVENUE,count(*)
from FUTURECONCERTS
group by CONCERTVENUE
having count(*)>1) a
WHERE CONCERTVENUE = a.CONCERTVENUE
/

November 22nd, 2003, 01:43 AM

ratumeli

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Thanks for the effort Shafique but no go =(

November 22nd, 2003, 04:40 AM

shammat

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I knew I missed something in the original post.

Nice solution shafique!

@ratumeli: works for me, although I had to supply a table alias for the futureconcerts table in the FROM clause and qualify the columns in the select list (but I tested it with Postgres, not Oracle, but that shouldn't matter)

Code:

SELECT f1.concertvenue,
       f1.concertdate,
       f1.performers
FROM futureconcerts f1,
     (SELECT concertvenue,
             COUNT(*) 
      FROM futureconcerts
      GROUP BY concertvenue
      HAVING COUNT (*) > 1
      ) a
WHERE f1.concertvenue = a.concertvenue
order by 2

November 22nd, 2003, 06:24 AM

ratumeli

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All I'd like to say Shammat is BULLSEYE !

Gave me exactly what I required.

Thanks for your time and effort Shammat and you too Shafique, i tried to mod your code to my liking but I must have wondered off somewhere.

November 22nd, 2003, 07:59 AM

shammat

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The credit goes to shafique. It's basically the same statement!

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