print only the duplicate values in sql.

[bhavin ragha]

is there a method that will allow me to print only the duplicate values

here in a column
--------
1
1
2
3
3

the out put would be
---------
1
3

[William P O'Sullivan]

Native sql, you could execute this in a Java method ...

select colname from tablename
order by colname
group by colname having count(*) > 1;


Try it ...
Then understand what the "group by" and "having" do

Pat.

[bhavin ragha]

i put this in and it did not work for me. it says "near "group": syntax error"

select releases.cd_id from releases
order by releases.cd_id
group by releases.cd_id
having count(*) > 1

[Martin Vajsar]

Move the order by clause to the end of the statement. Order by must always go last.