From: | Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at> |
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To: | "James David Smith *EXTERN*" <james(dot)david(dot)smith(at)gmail(dot)com>, "pgsql-novice(at)postgresql(dot)org" <pgsql-novice(at)postgresql(dot)org> |
Subject: | Re: 'AND' in WHERE clauses |
Date: | 2013-12-10 15:23:40 |
Message-ID: | A737B7A37273E048B164557ADEF4A58B17C7E158@ntex2010i.host.magwien.gv.at |
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Lists: | pgsql-novice |
James David Smith wrote:
> Sometimes I get a bit confused with my AND and OR clauses in WHERE statements. When I'm working with
> big data I often think it's done one thing and find later it's done another. Given this, would someone
> just glance at this for me please? Will this only set the_geom in the condition that ALL of my WHERE
> clauses are satisfied? ( I hope so)
>
> UPDATE stage SET the_geom = st_setsrid(st_makeline(st_makepoint(soose::integer, soosn::integer),
> st_makepoint(sdose::integer, sdosn::integer)),27700) WHERE sdurn::numeric = 0 AND bad_flag IS NULL AND
> smode5y = '1' AND st_length(st_makeline(st_makepoint(soose::integer, soosn::integer),
> st_makepoint(sdose::integer, sdosn::integer))) < 60;
Yes, all clauses joined with AND have to be satisfied for the condition to be true
and for the update to happen.
Yours,
Laurenz Albe
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