On 7 Aug 2010, at 23:18, Thomas Kellerer wrote:
Or as an alternative:
SELECT tid, purchase_date
FROM orders
WHERE item in ('Laptop', 'Desktop')
GROUP BY tid, purchase_date
HAVING count(*) = 2
This one is incorrect, it will also find people who bought two laptops or two
desktops on the
The condition
and table.item = 'laptop' and table.item = 'Desktop'
says: I want all rows where the column item has the value 'Laptop' and
*at the same time* has the value 'Desktop'
Which clearly cannot be the case (a column can only have a single value)
So you need to join all Laptop
Alban Hertroys wrote on 08.08.2010 10:46:
On 7 Aug 2010, at 23:18, Thomas Kellerer wrote:
Or as an alternative:
SELECT tid, purchase_date
FROM orders
WHERE item in ('Laptop', 'Desktop')
GROUP BY tid, purchase_date
HAVING count(*) = 2
This one is incorrect, it will also find people who
On 8 Aug 2010, at 3:37, Clemens Eisserer wrote:
What I would need is a LIMIT command, which allows to LIMIT the
results in two ways.
Is there some way to select only specific lines from a result, something like:
Select * from table Where RESULNR BETWEEN 1000 and 1040?
Or do you have any
Scott Frankel schrieb:
On Aug 6, 2010, at 6:13 AM, Torsten Zühlsdorff wrote:
John Gage schrieb:
On reflection, I think what is needed is a handbook that features cut
and paste code to do the things with Postgres that people do today
with MySQL.
Everyone of my trainees want such thing -
Glen Eustace geust...@godzone.net.nz writes:
My goal is to have a perl cgi script (that is accessed using AJAX)
perform some operations in a database using DBI. Some of the actions
are likely to take a while so my intent was to have a table that the
backend process periodically writes
Please do not top-post.
On 08/05/2010 09:42 AM, Ketema Harris wrote:
Never kill -9. Use kill -INT, whatever signal num that is, 11?
man kill
INT2
SEGV 11
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Hi Tom,
On 08/09/2010 03:33 AM, Tom Lane wrote:
Your note is awfully short of concrete details, but I'm guessing the
basic reason why this wasn't working for you was you were doing all the
operations as a single transaction. The results of that transaction
wouldn't be visible to another one
Glen Eustace geust...@godzone.net.nz writes:
Unfortunately your comments don't shed any light on the error I am getting;
could not receive data from server: Bad file descriptor.
This suggests to me that I might have lost the connection in my forked
perl process to the back-end. Can you
On Sun, Aug 08, 2010 at 01:55:19AM -0700, John R Pierce wrote:
The condition
and table.item = 'laptop' and table.item = 'Desktop'
says: I want all rows where the column item has the value 'Laptop'
and *at the same time* has the value 'Desktop'
Which clearly cannot be the case (a column
Hello all,
I need to run a query on a table that holds logged data from several
water flow meters.
I need the first and last values (with their associated time) for every
logger in a time range.
I've tried this that returns the min and max time in the desired range
for every logger, but
On 08/08/10 20.47, Jose Maria Terry wrote:
Hello all,
I need to run a query on a table that holds logged data from several
water flow meters.
I need the first and last values (with their associated time) for every
logger in a time range.
I've tried this that returns the min and max time in
El 08/08/10 21:49, Edoardo Panfili escribió:
On 08/08/10 20.47, Jose Maria Terry wrote:
Hello all,
I need to run a query on a table that holds logged data from several
water flow meters.
I need the first and last values (with their associated time) for every
logger in a time range.
I've
Not on that much evidence; but trying to pass a libpq connection across
a fork is usually risky. The trouble is that both parent and child
processes now hold copies of the open socket connection, but only one of
them can safely work with it. It could be that you've closed the libpq
connection
On Sun, Aug 08, 2010 at 12:33:40PM -0700, David Fetter wrote:
On Sun, Aug 08, 2010 at 01:55:19AM -0700, John R Pierce wrote:
The condition
and table.item = 'laptop' and table.item = 'Desktop'
says: I want all rows where the column item has the value
'Laptop' and *at the same
On Aug 8, 2010, at 2:45 AM, Torsten Zühlsdorff wrote:
Scott Frankel schrieb:
On Aug 6, 2010, at 6:13 AM, Torsten Zühlsdorff wrote:
John Gage schrieb:
On reflection, I think what is needed is a handbook that features
cut and paste code to do the things with Postgres that people do
today
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