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Message Posted: Thu, 25 Oct 2001 @ 19:42:22 GMT


     
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Subj:   Re: Count Function
 
From:   Kent Clay

Need a little more input.

If a sequence number is being used, what condition causes it to be used more than once?

If a seq nbr is being used to create a unique key, it indicates that col1 is not unique. Do the dupe seq nbrs have the same col1 value?

If you're looking for dupe seq nbrs only use:

Select seq_nbr, count(*)
From Blah
Group by 1
Having count(*) > 1

If you're looking for dupe col1/seq nbr combos use:

Select col1, seq_nbr, count(*)
From Blah
Group by 1, 2
Having count(*) > 1

KC



     
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