Re: Pls Hlp: SQL Problem - Mailing list pgsql-sql

From Richard Huxton
Subject Re: Pls Hlp: SQL Problem
Date
Msg-id 48CA432A.1050501@archonet.com
Whole thread Raw
In response to Pls Hlp: SQL Problem  (Hengky Lie <hengkyliwandouw@gmail.com>)
Responses Re: Pls Hlp: SQL Problem  (Hengky Lie <hengkyliwandouw@gmail.com>)
List pgsql-sql
Hengky Lie wrote:
> Dear friends,

Hello. Quick tip - don't reply to another message when starting a new
thread, people will assume it's part of the old thread.

[snip most of query]
> / 100::numeric * 

> Food";3960.0000;*4200.000000000000000000000000*;*240.000000000000000000000000*

> Why  the calculation result has so many decimals ?

Because you've cast 100 to numeric, rather than numeric(10,2) or
whatever. This means you get the full accuracy on the calculation - it
won't ever trim a numeric (that's the whole reason to have the type).

--  Richard Huxton Archonet Ltd


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