Hi Abbas, Thanks for your valuable suggestions. To my surprise I got the same output as what I have executed before. But unfortunately I'm unable to understand the logic of the code, in specific what is base 60 number? The used data type for "effort_hours" column is 'double precision'. Kindly help me in understanding the logic. Thanks in advance. Regards, Pavan -- Sent from: http://www.postgresql-archive.org/PostgreSQL-performance-f2050081.html
