From: | "(dot)(dot)(dot)tharas" <tharasp(at)gmail(dot)com> |
---|---|
To: | pgsql-novice(at)postgresql(dot)org |
Subject: | COUNT() BASED ON MULTIPLE WHERE CONDITIONS |
Date: | 2009-05-17 13:05:56 |
Message-ID: | 82d9696a0905170605r301fa515w7c13a074f1ed40ee@mail.gmail.com |
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Lists: | pgsql-novice |
Dear All,
I want to write a query which returns three different counts based on three
different conditions. The following data set and result set
may explain my scenario.
*Table Data *
PersonId work status Year
1 W 2008
2 W 2008
3 T 2008
4 S 2008
5 W 2008
6 T 2007
7 S 2009
*
Required Result set*
Year W_count T_count S_Count
2007 0 1 0
2008 3 1 1
2009 0 0 1
I could write three separate queries for this like
select count(PersonId) as W_count from my_table where Year = 2008
and workstatus = 'W'
can I get the whole result in a single query?
Thanks all.
roshni
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