Re: [SQL] why these results?
Yes. Thanks to all that responded. That was it. -wes On Mon, Aug 1, 2011 at 5:01 PM, Steve Crawford wrote: > On 08/01/2011 03:50 PM, Wes James wrote: >> >> select count(*) from table; >> >> count >> --- >> 100 >> (1 row) >> >> >> is correct >> >> select count(*) from table where col::text ~~* '%text%'; >> >> count >> --- >> 1 >> (1 row) >> >> is correct. >> >> But now if I do: >> >> >> select count(*) from table where col::text !~~* '%text%'; >> count >> --- >> 98 >> (1 row) >> >> Shouldn't it be 99? That is out of 100 records there is one that has >> "text" in column "col" so the !~~* should return 99 rows. ?? >> >> -wes >> > select count(*) from table where col is null; > > (null is neither equal nor not-equal to anything, even null) > > Cheers, > Steve > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql > -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] why these results?
On 08/01/2011 03:50 PM, Wes James wrote: select count(*) from table; count --- 100 (1 row) is correct select count(*) from table where col::text ~~* '%text%'; count --- 1 (1 row) is correct. But now if I do: select count(*) from table where col::text !~~* '%text%'; count --- 98 (1 row) Shouldn't it be 99? That is out of 100 records there is one that has "text" in column "col" so the !~~* should return 99 rows. ?? -wes select count(*) from table where col is null; (null is neither equal nor not-equal to anything, even null) Cheers, Steve -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] why these results?
On Mon, Aug 01, 2011 at 04:50:00PM -0600, Wes James wrote: > select count(*) from table; > > count > --- >100 > (1 row) > > > is correct > > select count(*) from table where col::text ~~* '%text%'; > > count > --- > 1 > (1 row) > > is correct. > > But now if I do: > > > select count(*) from table where col::text !~~* '%text%'; > count > --- > 98 > (1 row) > > Shouldn't it be 99? That is out of 100 records there is one that has > "text" in column "col" so the !~~* should return 99 rows. ?? Wild guess: select count (*) from table where col is null; count -- 1 (1 row) ";-) Reinoud -- __ "Nothing is as subjective as reality" Reinoud van Leeuwenreinou...@n.leeuwen.net http://reinoud.van.leeuwen.net kvk 27320762 __ -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] why these results?
On Monday, August 01, 2011 3:50:00 pm Wes James wrote: > select count(*) from table; > > count > --- >100 > (1 row) > > > is correct > > select count(*) from table where col::text ~~* '%text%'; > > count > --- > 1 > (1 row) > > is correct. > > But now if I do: > > > select count(*) from table where col::text !~~* '%text%'; > count > --- > 98 > (1 row) > > Shouldn't it be 99? That is out of 100 records there is one that has > "text" in column "col" so the !~~* should return 99 rows. ?? NULL value in field? > > -wes -- Adrian Klaver adrian.kla...@gmail.com -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
[SQL] why these results?
select count(*) from table; count --- 100 (1 row) is correct select count(*) from table where col::text ~~* '%text%'; count --- 1 (1 row) is correct. But now if I do: select count(*) from table where col::text !~~* '%text%'; count --- 98 (1 row) Shouldn't it be 99? That is out of 100 records there is one that has "text" in column "col" so the !~~* should return 99 rows. ?? -wes -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
