Hi Pierre,
Looking at your Excel document I think I misinterpreted, and you are
trying to take the stddev of each column separately (which makes a lot
more sense!). In the case you can say this:
select id, stddev(a), stddev(b), stddev(c) from foo group by id;
Paul
On Wed, Jan 21, 2015 at
Oh sorry, you should leave off the grouping:
select stddev(a), stddev(b), stddev(c) from foo;
Paul
On Wed, Jan 21, 2015 at 10:24 AM, Paul Jungwirth
p...@illuminatedcomputing.com wrote:
Hi Pierre,
Looking at your Excel document I think I misinterpreted, and you are
trying to take the stddev
On 01/21/2015 11:02 AM, Pierre Hsieh wrote:
Hi Raymond,
Thanks for your reply. Please see detail as following. Thanks again.
Pierre
Inline image 1
On Thu, Jan 22, 2015 at 1:48 AM, Raymond O'Donnell r...@iol.ie
mailto:r...@iol.ie wrote:
On 21/01/2015 17:32, Pierre Hsieh wrote:
Hi
On 01/21/2015 11:31 AM, Pierre Hsieh wrote:
updated rule
Inline image 1
On Thu, Jan 22, 2015 at 2:28 AM, Pierre Hsieh pierre.hs...@gmail.com
mailto:pierre.hs...@gmail.com wrote:
Thanks for your reply.
Let me to describe the purpose for this calculation roughly.
Column B is for
Thanks for your reply.
Let me to describe the purpose for this calculation roughly.
Column B is for the price of stock.
Column C D are the slope and interception of linear regression
from Column B.
The final result which I need is the standard deviation on the difference
between stock price and
Hi Pierre,
It looks like you're saying that each row has an id plus three numeric
columns, and you want the stddev calculated from the three numeric
columns? In that case you could do this:
create table foo (id integer, a float, b float, c float);
insert into foo values (1, 2,3,4);
insert into
On 21/01/2015 17:32, Pierre Hsieh wrote:
Hi guys,
Thanks for your replies.
I certainly can use VBA and ADODB object in Excel to do it. Due to
performance, I wanna try to do it by SQL command in PG. However, I am
not expert in PG, so I need few help from your guys. Let me to describe
my
Hi Raymond,
Thanks for your reply. Please see detail as following. Thanks again.
Pierre
[image: Inline image 1]
On Thu, Jan 22, 2015 at 1:48 AM, Raymond O'Donnell r...@iol.ie wrote:
On 21/01/2015 17:32, Pierre Hsieh wrote:
Hi guys,
Thanks for your replies.
I certainly can use VBA
On 21/01/2015 18:02, Pierre Hsieh wrote:
Hi Raymond,
Thanks for your reply. Please see detail as following. Thanks again.
Can you describe *in words* what sort of calculation you want to do?
Ray.
--
Raymond O'Donnell :: Galway :: Ireland
r...@iol.ie
--
Sent via pgsql-general mailing
On Jan 19, 2015, at 5:07 PM, Stefan Keller wrote:
Hi
I'm pretty sure PostgreSQL can handle this.
But since you asked with a theoretic background,
it's probably worthwhile to look at column stores (like [1]).
Wow. I didn't know there was a column store extension for PG -- this would come
On 21/01/2015 14:38, Pierre Hsieh wrote:
Hi,
Would you please tell me whether PostgreSQL can execute the following
tasks? If not, please also tell me which one can help me for that. Thanks
Not clear what you're asking, but if you just want to find the standard
deviation of a sample
More bluntly maybe :
if you can do it in Excel,
you can do it in Postgres.
Cheers,
Rémi-C
2015-01-21 16:37 GMT+01:00 Raymond O'Donnell r...@iol.ie:
On 21/01/2015 14:38, Pierre Hsieh wrote:
Hi,
Would you please tell me whether PostgreSQL can execute the following
tasks? If not,
This is not quite true. I don't believe there are any flight
simulator easter-eggs hidden inside the Postgres code. :)
On Wed, Jan 21, 2015 at 10:59 AM, Rémi Cura remi.c...@gmail.com wrote:
More bluntly maybe :
if you can do it in Excel,
you can do it in Postgres.
Cheers,
Rémi-C
On 21/01/2015 16:06, Brian Dunavant wrote:
This is not quite true. I don't believe there are any flight
simulator easter-eggs hidden inside the Postgres code. :)
No? Awww. :-)
Ray.
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Raymond O'Donnell :: Galway :: Ireland
r...@iol.ie
--
Sent via pgsql-general mailing list
Jonathan Vanasco-7 wrote
This is really a theoretical/anecdotal question, as I'm not at a scale yet
where this would measurable. I want to investigate while this is fresh in
my mind...
I recall reading that unless a row has columns that are TOASTed, an
`UPDATE` is essentially an `INSERT +
Hi guys,
Thanks for your replies.
I certainly can use VBA and ADODB object in Excel to do it. Due to
performance, I wanna try to do it by SQL command in PG. However, I am not
expert in PG, so I need few help from your guys. Let me to describe my
question clearly as following.
The final results
In a number of places on the web I've seen it claimed that ordering can be set
via prepared statements. Indeed, the expected syntax is accepted on my 9.3
server without errors:
sandbox=# CREATE TABLE test (
id serial PRIMARY KEY,
gender char
);
sandbox=# INSERT INTO test(gender) VALUES('m')
In a number of places on the web I've seen it claimed that ordering can be
set via prepared statements.
...
sandbox=# PREPARE testplan(text) AS
SELECT * FROM test ORDER BY $1;
But the output is not what one would expect:
sandbox=# EXECUTE testplan('gender');
...
As opposed to:
Paul Jungwirth wrote
In a number of places on the web I've seen it claimed that ordering can
be
set via prepared statements.
...
sandbox=# PREPARE testplan(text) AS
SELECT * FROM test ORDER BY $1;
But the output is not what one would expect:
sandbox=# EXECUTE testplan('gender');
...
As
On 01/21/2015 12:51 PM, Bryn Jeffries wrote:
In a number of places on the web I've seen it claimed that ordering can
be set via prepared statements.
Can you give a link to one of those examples?
Many thanks,
Bryn
--
Adrian Klaver
adrian.kla...@aklaver.com
--
Sent via pgsql-general
Sorry, I can't find any now. It's cropped up in a few forums, in the context of
executing queries from web services. Clearly not significantly enough to show
up in Google...
- Reply message -
From: Adrian Klaver adrian.kla...@aklaver.com
To: Bryn Jeffries bryn.jeffr...@sydney.edu.au,
Paul Jungwirth wrote
I'm not sure how to make a prepared statement that lets you name a
column when you execute it. Maybe someone else can chime in if that's
possible.
David J. responded
You cannot. By definition parameters, in this context, are values - not
identifiers.
[...]
In both
On Wed, Jan 21, 2015 at 4:09 PM, Bryn Jeffries
bryn.jeffr...@sydney.edu.au wrote:
Maybe what we need in ODBC libs and the like is a protected
statement that follows the same construction as a prepared statement but
additionally checks catalogs to validate identifiers.
I'm not sure
On Wed, Jan 21, 2015 at 4:09 PM, Bryn Jeffries bryn.jeffr...@sydney.edu.au
wrote:
Paul Jungwirth wrote
I'm not sure how to make a prepared statement that lets you name a
column when you execute it. Maybe someone else can chime in if that's
possible.
David J. responded
You cannot. By
On 01/21/2015 03:09 PM, Bryn Jeffries wrote:
Paul Jungwirth wrote
I'm not sure how to make a prepared statement that lets you name a
column when you execute it. Maybe someone else can chime in if that's
possible.
David J. responded
You cannot. By definition parameters, in this context, are
That's a lot of databases and explains why the logs were so busy.
For the purpose of testing it would be interesting to simplify this case
down, if you can, to the minimum required to reproduce the issue. It's
awfully hard to keep track of what's going on with this many concurrent
operations -
sri harsha wrote:
Is there any way to stop concurrent inserts to happen on a single table
??
If you really want that, it is easy with table locks.
Actually i am using a FDW , in which the data is written into a single
file. So when i do
concurrent inserts , the data is written
Hi,
Actually i am using a FDW , in which the data is written into a single
file. So when i do concurrent inserts , the data is written into the file
simultaneously and this is causing a data corruption . Is TABLE LOCK the
only option available ??
--Harsha
On Wed, Jan 21, 2015 at 3:22 PM,
Hi Andres,
Any other conf should I list in addition to the bdr settings below?
BDR Settings(replaced the real db name here):
1. on node 01, the replication src one:
# Generic settings required for BDR
max_replication_slots = 60
max_wal_senders = 60
wal_level = 'logical'
track_commit_timestamp
Hi,
Is there any way to stop concurrent inserts to happen on a single table
??
Query 1 : INSERT INTO TABLE_A SELECT * FROM TABLE1;
Query 2 : INSERT INTO TABLE_A SELECT * FROM TABLE2;
Query 3 : SELECT * FROM TABLE_A;
Assume i have the above queries. Query 1 and Query 3 can occur concurrently
sri harsha wrote:
Is there any way to stop concurrent inserts to happen on a single table ??
Query 1 : INSERT INTO TABLE_A SELECT * FROM TABLE1;
Query 2 : INSERT INTO TABLE_A SELECT * FROM TABLE2;
Query 3 : SELECT * FROM TABLE_A;
Assume i have the above queries. Query 1 and Query 3 can
@Rob Sargent: sorry Rob, not sure what you are asking.
@Kyotaro HORIGUCHI
thanks for your reply and time Kyotaro,
Using the following query
EXPLAIN ANALYZE SELECT * FROM measurement_events WHERE
measurement_source_id='df86917e-8df0-11e1-8f8f-525400e76ceb' AND
measurement_time = '2015-01-01
Hi,
Would you please tell me whether PostgreSQL can execute the following
tasks? If not, please also tell me which one can help me for that. Thanks
--
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