How to use select Query in PostgresSQL?

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Dear All,
I am using Asp.net C# and Postgresql. I need to get record of more than 0.5 of duration.I am using following Query.

SELECT "EmployeeID", "EmployeeName",date("StartTime") ,sum(to_number("Duration",'9999.99')) as "Dur" FROM "Employee_TimeSheet" WHERE date("StartTime") between date('1/1/2016 12:00:00 AM') and date('1/31/2016 12:00:00 AM')
group by "EmployeeID", "EmployeeName",date("StartTime");

Get Following type of Records.

"Name"; "Date" ;"Duration"
"Thirugnana sambantham_V";"2016-01-30";0
"Beeresh_H E";"2016-01-29";0.81
"Prabahar_A";"2016-01-29";0.46
"Ramakrishnan_N";"2016-01-28";0
"Saravanakumar_S";"2016-01-30";1.61
"Madhu_K E";"2016-01-29";2.5
"Marimuthu_V";"2016-01-29";0.99
"Thirugnana sambantham_V";"2016-01-27";0.74

I need only more then 0.5 of duration any one modified my query for that need.

Thanks Advance.

Posted 2-Feb-16 21:07pm

Member 11889799

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Garth J Lancaster · Answer 1 · 2016-02-02T21:49:00

There's two ways I can think of, but Its not clear if you want the total duration to be > 0.5 or select individual records of duration > 0.5 (and sum those looking at your code)

In the first instance, I would look at this PostgreSQL: Documentation: 8.1: Aggregate Functions[^], in the second, well surely you can add the 'and duration ... ' clause to your query