...@gallo.ucsf.edu
-Original Message-
From: Osvaldo Kussama [mailto:osvaldo.kuss...@gmail.com]
Sent: Tue 6/30/2009 6:49 PM
To: Tena Sakai
Subject: Re: [SQL] it's not NULL, then what is it?
2009/6/30 Tena Sakai tsa...@gallo.ucsf.edu:
Hi Everybody,
I have a table called gallo.sds_seq_reg_shw,
which
(10 rows)
canon=#
Regards,
Tena Sakai
tsa...@gallo.ucsf.edu
-Original Message-
From: Rob Sargent [mailto:robjsarg...@gmail.com]
Sent: Wed 7/1/2009 9:36 AM
To: Tena Sakai
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
So they were null, and null turns
Tena Sakai tsa...@gallo.ucsf.edu writes:
So they were null,
Yes!
and null turns out to be a seven-character blank string!?
I don't understand how that happens. Mr Tom Lane
hinted that it might be a bug in sprintf...
Well, that was before I read the messages where it turned out that they
@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
Tena Sakai tsa...@gallo.ucsf.edu writes:
So they were null,
Yes!
and null turns out to be a seven-character blank string!?
I don't understand how that happens. Mr Tom Lane
hinted that it might be a bug in sprintf...
Well
Hi Everybody,
I have a table called gallo.sds_seq_reg_shw,
which is like:
canon=# \d gallo.sds_seq_reg_shw
Table gallo.sds_seq_reg_shw
Column | Type | Modifiers
--+-+---
name | text|
response | text|
Tena Sakai wrote:
Hi Everybody,
I have a table called gallo.sds_seq_reg_shw,
which is like:
canon=# \d gallo.sds_seq_reg_shw
Table gallo.sds_seq_reg_shw
Column | Type | Modifiers
--+-+---
name | text|
response
Just out of curiosity did you try maf = 0?
Edward W. Rouse
From: pgsql-sql-ow...@postgresql.org [mailto:pgsql-sql-ow...@postgresql.org]
On Behalf Of Tena Sakai
Sent: Tuesday, June 30, 2009 6:03 PM
To: pgsql-sql@postgresql.org
Subject: [SQL] it's not NULL, then what is it?
Hi Everybody
...
canon=# select count(maf) from gallo.sds_seq_reg_shw
canon-# where maf ISNULL;
count
---
0
(1 row)
I believe count will only count not-null anyway so this will always
return zero. Try count(*) instead of count(maf). Here's an example:
st...@[local]= select * from
Steve Crawford wrote on 01.07.2009 00:39:
canon=# select count(maf) from gallo.sds_seq_reg_shw
canon-# where maf ISNULL;
I believe count will only count not-null
Correct
SELECT count(some_col)
FROM some_table;
is the same as
SELECT count(*)
FROM some_table
WHERE some_col IS NOT NULL;
Sakai
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
Tena Sakai wrote:
Hi Everybody,
I have a table called gallo.sds_seq_reg_shw,
which is like:
canon=# \d gallo.sds_seq_reg_shw
Table gallo.sds_seq_reg_shw
Column | Type
...@postgresql.org on behalf of Edward W. Rouse
Sent: Tue 6/30/2009 3:22 PM
To: pgsql-sql@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
Just out of curiosity did you try maf = 0?
Edward W. Rouse
From: pgsql-sql-ow...@postgresql.org [mailto:pgsql-sql-ow...@postgresql.org
Sakai
tsa...@gallo.ucsf.edu
-Original Message-
From: Steve Crawford [mailto:scrawf...@pinpointresearch.com]
Sent: Tue 6/30/2009 3:39 PM
To: Tena Sakai
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
...
canon=# select count(maf) from
q
4645647
$
Many thanks, Osvald.
Regards,
Tena Sakai
tsa...@gallo.ucsf.edu
-Original Message-
From: Osvaldo Kussama [mailto:osvaldo.kuss...@gmail.com]
Sent: Tue 6/30/2009 6:49 PM
To: Tena Sakai
Subject: Re: [SQL] it's not NULL, then what is it?
2009/6/30 Tena Sakai tsa
,
Tena Sakai
tsa...@gallo.ucsf.edu
-Original Message-
From: Tom Lane [mailto:t...@sss.pgh.pa.us]
Sent: Tue 6/30/2009 7:17 PM
To: Tena Sakai
Cc: Edward W. Rouse; pgsql-sql@postgresql.org
Subject: Re: [SQL] it's not NULL, then what is it?
Tena Sakai tsa...@gallo.ucsf.edu writes:
My
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