Howdy, Adrian
Dunno if this is exactly what you want
SELECT *
FROM
(
SELECT chr,cfrom,cto,count(*) as numberOfDuplicates
FROM t_fairly_large_table
GROUP BY chr,cfrom,cto
) x
NATURAL JOIN t_fairly_large_table y
WHERE numberOfDuplicates > 1
The idea of this (untested) query
is to produce somet
Hi,
On 23 September 2010 07:30, Adrian Johnson wrote:
> I want to find out how many duplications are there for chr, cfrom and cto
Start with it http://www.postgresql.org/docs/9.0/interactive/tutorial-agg.html
p.s.
SELECT chr, cfrom, cto, count(*) FROM your_table GROUP BY 1, 2, 3;
>
> a. c2,
