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Combinations

Author

Topic

pravin14u
Posting Yak Master

246 Posts

Posted - 2008-01-14 : 03:09:36

Hi,

I have a table with 2 columns (S.No,Name) with rows
1,Raja
2,Ramu
3,Rane

I need to generate all 2 pair combinations of the names(i,e)

(Raja -Ramu)
(Raja -Rane)
(Ramu -Rane)

Can some one give me a generalized query for this problem?

Thanks,

Prakash.P

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2008-01-14 : 03:31:25

CROSS JOIN with inequality filter.

SELECT t1.Name, t2.Name
FROM Table1 AS t1
CROSS JOIN Table1 AS t2
WHERE t1.Sno < t1.Sno

E 12°55'05.25"
N 56°04'39.16"

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2008-01-14 : 03:31:48

This is also known as "triangular join".

E 12°55'05.25"
N 56°04'39.16"

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2008-01-14 : 03:37:53

quote:
Originally posted by Peso

CROSS JOIN with inequality filter.

SELECT t1.Name, t2.Name
FROM Table1 AS t1
CROSS JOIN Table1 AS t2
WHERE t1.Sno < t2.Sno

E 12°55'05.25"
N 56°04'39.16"

Madhivanan

Failing to plan is Planning to fail

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2008-01-14 : 04:34:27

Thank you.

E 12°55'05.25"
N 56°04'39.16"

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