From: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com> |
---|---|
To: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: Aggregate Functions |
Date: | 2006-11-20 06:06:53 |
Message-ID: | 20061120060653.GA27960@a-kretschmer.de |
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Lists: | pgsql-novice |
am Sun, dem 19.11.2006, um 21:05:24 -0800 mailte Yadnyesh Joshi folgendes:
> According to the documentation, when "avg" or "stddev" function is used with
> integer arguments, the result is an integer. How can I obtain floating point
Thats not true:
test=> create table ints (i int);
CREATE TABLE
test=*> insert into ints values (2);
INSERT 0 1
test=*> insert into ints values (3);
INSERT 0 1
test=*> select avg(i) from ints;
avg
--------------------
2.5000000000000000
(1 row)
test=*> select stddev(i) from ints;
stddev
------------------------
0.70710678118654752440
(1 row)
Andreas
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Andreas Kretschmer
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