Ranjeet Dhumal wrote: > When am trying to query a table temp_table1(sms_type varchar(20),sms_info varchar(100),sms_id integer) > Query :: select sms_type,count(*) from temp_table1 group by 1 order by 2 desc; > Then i got following errors , i dont know whats wrong in this . > ERROR: volatile EquivalenceClass has no sortref > > This is my first post to forum , Please suggest me if i miss something . Do you get this error regardless of what is in the table? I tried on 9.2 with an empty table and with one with a few random values and got no error. It would be helpful to know which PostgreSQL version you have. Can you construct a reproducible test case? Yours, Laurenz Albe -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general