Hi,

Let us say we have a table called, MYTABLE.

Select * from MYTABLE;

ColA ColB
---------- ---------------
1 100112
2 100113
3 100114
4 100112

4 rows selected.


I am looking for a SQL which will report Col B and Col A as

ColB Occurrences
---------- ----------------------
100112 1, 4
100113 2
100114 3


Can you kindly help me?






Thanks in advance,
Suddha

Suddha,

Can you search here(p2p.wrox)in one of the SQL forums? I remember this question had been asked here and answered long back. Sorry I haven't got time to search that and post the link here for you.

cheers.

_________________________
- Vijay G
Strive for Perfection

Sorry, I tried searching, but did not hit upon a solution to my problem.
Can someone help?



Thanks in advance,
Suddha

May be not searching with the right word. Let me see if I can search it for you. But give me sometime. I am in the middle of something...

_________________________
- Vijay G
Strive for Perfection

Look for P2P Forum > SQL Server > SQL Server 2000 > "Concatenating like records" topic on the fourth page. That should help you...


_________________________
- Vijay G
Strive for Perfection

Thanks a lot.
But is it not possible to do it in a single SQL statement.

I am on oracle.



Thanks in advance,
Suddha

I didn't know that you are using Oracle. Still you can use this as a template and start working on. Let me post if I can do that with single statement.

Cheers

_________________________
- Vijay G
Strive for Perfection

Suddha,

I couldn't spend much time on this. You can also take a look at the comma separated list which was referenced within the topic I referred you earlier. Not sure if you looked at it, though not sure if that helps you. Worth taking a look still.

Cheers

_________________________
- Vijay G
Strive for Perfection

Thanks Vijay for all your prompt responses.
The thingis it is easy to do this using PL/SQL but quite hard to do using a SQL stmt.

I would still kindly request you to investigate this in your spare time, as this query would really help me.





Thanks in advance,
Suddha

If you were using SQL Server Transact SQL, then you could always write a recursive user defined function to build a long string of all the comma separated values.

However, recursion only goes so deep, so I sometimes create a temporary table, and then write a loop that assigns the current value a parameter value that can be used in a where clause for appending to to a string.

Is this making any sense?

Zak

Zak Willis
Managing Director of www.blue-rhino.co.uk