kill them.
I noticed, however, that the LIMIT statement I specified in the event wasn't
present in the actual queries... Could that be a parser bug, or does the limit
simply not show up in the process lists? Has anyone seen this before ?
This is 5.5.30-1.1-log on Debian 64-bit.
Tha
- Original Message -
> From: "Akshay Suryavanshi"
> I was referring to a condition when there is no index on the tables,
> not even primary keys.
If you have a lot of data in there, may I suggest you (temporarily) add a
unique index and benchmark both methods? As I
etera.
>
> The ONLY way to ensure consecutive queries return your data in the same
> order, is specifying an order by clause.
>
> Apart from that, I personally prefer to avoid the limit 0,10 /limit 11/20
> technique, because a) rows might have gotten inserted and/or deleted, a
utive queries return your data in the same order,
is specifying an order by clause.
Apart from that, I personally prefer to avoid the limit 0,10 /limit 11/20
technique, because a) rows might have gotten inserted and/or deleted, and b)
limit is applied to the full resultset.
Instead, order by
There's a confusion. I want to get all the data in table t by pages, using
> Limit SQL without ORDER BY:
> SELECT * FROM t Limit 0,10
> SELECT * FROM t Limit 10, 10
> ...
>
> Is it right without ORDER BY?
> Is there any default order in table t, to make suer I can get all data i
elounge.net]
> Sent: Saturday, July 14, 2012 11:19 AM
> To: mysql@lists.mysql.com
> Subject: Re: mysql - uppoer limit for doing simultaneous red/writes..
>
>
>
> Am 14.07.2012 19:16, schrieb bruce:
> > Hi.
> >
> > Considering a system, where I have a centraliz
Am 14.07.2012 19:16, schrieb bruce:
> Hi.
>
> Considering a system, where I have a centralized Mysql setup. I'm not
> sure exactly what this should be called, single box, cluster, etc...
>
> But I'm looking to have a system of a a bunch of boxes, whihc run apps
> that will access (read/write) t
Hi.
Considering a system, where I have a centralized Mysql setup. I'm not
sure exactly what this should be called, single box, cluster, etc...
But I'm looking to have a system of a a bunch of boxes, whihc run apps
that will access (read/write) to the different dbs/tbls on the mysql
setup.
I'm tr
determined
> by a random value created only at the time of the query, what better
> technique could they use than to materialize the table, sort the data,
> then return the results?
I agree that the common technique of ORDER BY RAND() LIMIT 1 is brain dead in
its expectations.
And yet, this
: RE: Why does the limit use the early row lookup.
>
> > If you are doing Pagination via OFFSET and LIMIT -- Don't. Instead,
> > remember where you "left off".
> > (More details upon request.)
>
> Thanks for your answer.
>
> Can you tell us the be
> If you are doing Pagination via OFFSET and LIMIT --
> Don't. Instead, remember where you "left off".
> (More details upon request.)
Thanks for your answer.
Can you tell us the better approach about pagination to prevent to scan all
table rows?
How to use "l
Shawn...
ORDER BY RAND() LIMIT 10
Also assuming:
Table >> 10 rows
MEMORY is practical for tmp table in this case
Here's a faster way:
Keep an in-RAM "priority queue", truncating it at 10 items. Simply insert rows
into it as you walk through the unsorted table. The eff
y to avoid scanning 110 rows of something (data or index).
If you are doing Pagination via OFFSET and LIMIT -- Don't. Instead, remember
where you "left off". (More details upon request.)
You can trick MySQL into doing "late row lookup" via a "self join":
SELECT
es a
>> temporary table wil ALL data as example even with limit
>>
>> select * from table order by rand() limit 10;
>> reads and writes the whole table to disk
>> have fun with large tables :-)
>>
>>
>
When the Optimizer is told to sort a result set in t
Why does not the mysql developer team to do this optimization?
--- 12年4月20日，周五, Reindl Harald 写道：
> 发件人: Reindl Harald
> 主题: Re: Why does the limit use the early row lookup.
> 收件人: mysql@lists.mysql.com
> 日期: 2012年4月20日,周五,下午3:50
>
>
> Am 20.04.2012 04:29, schrieb 张志刚:
i know what it does, but it is simply idiotic
select pri_key_field from table order by rand() limit 10;
why in the world can this not be doe with an index?
only the auto_increment field is involved
soryy, no understanding
it is idiotic that you need to "select pri_key_field from table
Any ORDER BY (that cannot be done using an index) will gather all the data
first, then sort, then do the LIMIT.
Potential optimizations include
* Keep a "pointer", not the whole data. (This may be practical for SELECT *,
but not practical in other cases.)
* Build a "priority q
Am 20.04.2012 04:29, schrieb 张志刚:
> My point is that the limit can use late row lookup: lookup rows after
> checking indexes to optimize the select speed.
>
> But the mysql optimizer do it with the early row lookup: lookup all rows
> before checking indexes when the one fetch c
- Original Message -
> From: "Alexandr Normuradov"
>
> so far I could not find any answer on how to abort queries that
> exceed certain size of internal temporary tables.
I'm not sure there is.
> On certain quite often scenarios these internal tables are being
> converted to Myisam on d
Hello List,
so far I could not find any answer on how to abort queries that exceed
certain size of internal temporary tables.
On certain quite often scenarios these internal tables are being
converted to Myisam on disk tables. And that creates a high IO
depending on situation.
Putting tmpdir in
can't be
answered.
On Wed, Feb 16, 2011 at 8:48 AM, Reindl Harald wrote:
> there are no hard limits as long your hardware ist fast enough
>
> * memory, memory and agin: memory
> * disk-speed
> * cpu
>
> Am 16.02.2011 06:04, schrieb Adarsh Sharma:
> > Dear all,
>
there are no hard limits as long your hardware ist fast enough
* memory, memory and agin: memory
* disk-speed
* cpu
Am 16.02.2011 06:04, schrieb Adarsh Sharma:
> Dear all,
>
> I want to know the upper limit of mysql after which Mysql-5.* fails to
> handle large amount of data (
Dear all,
I want to know the upper limit of mysql after which Mysql-5.* fails to
handle large amount of data ( 100's of GB or 100's of TB's ) . After
which we have to move to some NoSQL databases ( Hadoop, Hive , Hbase).
Currently we have 100 of GB's data in Mysql -5
avis
>>>
>>> -Original Message-
>>> From: Richard Reina [mailto:gatorre...@gmail.com]
>>> Sent: Thursday, February 10, 2011 3:07 PM
>>> To: mysql@lists.mysql.com
>>> Subject: function to limit value of integer
>>>
>>&g
ng
> > system you want to use.
> >
> > -Travis
> >
> > -Original Message-
> > From: Richard Reina [mailto:gatorre...@gmail.com]
> > Sent: Thursday, February 10, 2011 3:07 PM
> > To: mysql@lists.mysql.com
> > Subject: function to limit valu
gt; -Travis
>
> -Original Message-
> From: Richard Reina [mailto:gatorre...@gmail.com]
> Sent: Thursday, February 10, 2011 3:07 PM
> To: mysql@lists.mysql.com
> Subject: function to limit value of integer
>
> Is there a function that can limit the value of an integer i
l.com]
Sent: Thursday, February 10, 2011 3:07 PM
To: mysql@lists.mysql.com
Subject: function to limit value of integer
Is there a function that can limit the value of an integer in a MySQL
query? I am trying to write a query that scores someones experience.
However, number of jobs can b
Is there a function that can limit the value of an integer in a MySQL
query? I am trying to write a query that scores someones experience.
However, number of jobs can become overweighted in the the query below. If
someone has done 10 jobs vs. 1 that's a big difference in experience. But
so
LIMIT 1), (subquery which will return
tblStatusy.Status, tblStatusy.Data ordered by Data DESC LIMIT 1,1),
(subquery which will return tblStatusy.Status, tblStatusy.Data ordered by
Data DESC LIMIT 2,1)
Any idea how to get this?
Best regards
a
>> > 64-bit
>> > flavour of *nix on that box, I don't think you have to worry.
>>
>> Linux on 64-bits.
>
> Yes, but is the Linux (and your MySQL) itself also 64-bits ? :-p You *can*
> use all of your ram on a 32-bit linux with the Bigmem trick, but that
&
y.
>
> Linux on 64-bits.
>
Yes, but is the Linux (and your MySQL) itself also 64-bits ? :-p You *can*
use all of your ram on a 32-bit linux with the Bigmem trick, but that
introduces quite a bit of overhead, and doesn't remove the per-process
limit. A 32-bit MySQL will simply not be able
or do I have to
configure something else?
> On Fri, Jul 9, 2010 at 4:44 AM, Camilo Uribe wrote:
>>
>> Hi:
>>
>> There is a limit in the amount of ram I could use for mysql? (I have a
>> server with 96GB of ram)
>>
>> --
>> MySQL General Mailing List
&
Correct. To verify this, simply create a select with the same structure as
your delete - the execution plan will be similar.
I do not believe limit will help you, however, as it is only applied after
execution, when the full dataset is known.
On Thu, Sep 9, 2010 at 8:06 AM, Ananda Kumar wrote
e_code_type` = '32',
> `bite_subcode` = '21', `description_text` = 'Some random fault description
> here.', `fault_id` = '11-1', `fault_impact_other_explain` = '',
> `id_fault_area_impact` = '3', `symptom_lru_id` = &#
7;232', `symptom_lru_subid`
= '34', `sys_perf_affected` = '', `update_date` = '2010-09-09 00:04:29'
WHERE id_fault_impact = '2495' LIMIT 1;
DELETE FROM fault_impact_has_fault_system_impact WHERE id_fault_impact =
2495;
INSERT INTO
fault_impact_h
Well, it wouldn't exactly limit the size of your tables, but you may want to
look into creating a partitioned table to store your data. You could define
your partition ranges to store a single day's worth of data or whatever
granularity works best for you. Then, when you need to re
Hello everyone,
I've actually a database (MySAM) which is growing very quickly (1,3Go/hour).
I would like to limit the size of the database but with a log rotation after
the size is reached. Do you know a way to do it ?
I thought of maybe a script who would delete the oldest entry when it re
Because you are sorting the results, the LIMIT clause has to be applied after
all of the eligible rows have been retrieved. There shouldn't be a big
difference between 2 and 3, but there would be between 2 and 2.
Regards,
Jerry Schwartz
Global Information Incorporated
195 Farmingto
> Isn't it so that it firstly order the rows by id (index'ed?) and then scan
> it to pick the rows which satisfy the where clause?
>
> It stops when the result reaches the limit, otherwise scans the whole (27,
> 000 rows scan).
>
> Then the response time with 2 ro
Hi,
> With the following query if I it returns 2 results it's fast .04s, if
> it has less results than the limit it takes 1minute.
>
> Query:
> select * from hub_dailies_sp where active='1' and date='2010-08-04'
> order by id desc LIMIT 2;
>
>
With the following query if I it returns 2 results it's fast .04s, if
it has less results than the limit it takes 1minute.
Query:
select * from hub_dailies_sp where active='1' and date='2010-08-04'
order by id desc LIMIT 2;
Show create table:
http://pastebin.org/447
This will mostly depend on your OS, really. Assuming you're running a 64-bit
flavour of *nix on that box, I don't think you have to worry.
On Fri, Jul 9, 2010 at 4:44 AM, Camilo Uribe wrote:
> Hi:
>
> There is a limit in the amount of ram I could use for mysql? (I have a
&g
Hi:
There is a limit in the amount of ram I could use for mysql? (I have a
server with 96GB of ram)
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
I query a particular SectionID rows it should return all those
rows.
If I use "LIMIT x,10" it should return 10 rows beginning at record
#x, but
my doubt is:
Does the OFFSET x assumes its value to be #x number of consecutive
rows, or
it is relative to the query results?
For exa
items into different sections.
If I query a particular SectionID rows it should return all those rows.
If I use "LIMIT x,10" it should return 10 rows beginning at record #x, but
my doubt is:
Does the OFFSET x assumes its value to be #x number of consecutive rows,
or
it is relative to
items into different sections.
If I query a particular SectionID rows it should return all those rows.
If I use "LIMIT x,10" it should return 10 rows beginning at record #x, but
my doubt is:
Does the OFFSET x assumes its value to be #x number of consecutive rows, or
it is relative to
out that, the Handler_read_rnd_next variable was
> zero in both cases.
>
> Before running each query, I ran "flush status", then the query, then "show
> session status like 'Handler%'". The first one had a value of 207 for
> "Handler_read_rnd_next&q
ECT actor_id FROM sakila.actor USE INDEX(PRIMARY) WHERE first_name =
'PENELOPE' LIMIT 1;
Which supposedly would not do a full table scan, and it seems logical.
The explain output for this is the following (tabs replaced with colon):
id:select_type:table:type:possible_keys:key:key_len:ref:r
he alternative was this:
>
> SELECT actor_id FROM sakila.actor USE INDEX(PRIMARY) WHERE first_name =
> 'PENELOPE' LIMIT 1;
>
> Which supposedly would not do a full table scan, and it seems logical.
>
> The explain output for this is the following (tabs replaced wit
this.
The first sample query was:
SELECT MIN(actor_id) FROM sakila.actor WHERE first_name = 'PENELOPE';
As described, this does a table scan, looking at 200 rows.
The alternative was this:
SELECT actor_id FROM sakila.actor USE INDEX(PRIMARY) WHERE
first_name = 'PENELOP
All,
I can't find the following informations on the MySQL Docs to see if there
are limits on data types using NDB6.2:
[1] What is the maximum length for one record of a NDB 6.2 storage engine
table? (65k like MyISAM?)
[2] Is it possible to use TEXT and BLOB fields without any problem?
Thanks
C
On Wed, Jan 7, 2009 at 1:48 PM, Jerry Schwartz
wrote:
>
>
>>-Original Message-
>>From: baron.schwa...@gmail.com [mailto:baron.schwa...@gmail.com] On
>>Behalf Of Baron Schwartz
>>Sent: Wednesday, January 07, 2009 9:54 AM
>>To: Jerry Schwartz
>>Cc:
>-Original Message-
>From: baron.schwa...@gmail.com [mailto:baron.schwa...@gmail.com] On
>Behalf Of Baron Schwartz
>Sent: Wednesday, January 07, 2009 9:54 AM
>To: Jerry Schwartz
>Cc: mysql@lists.mysql.com
>Subject: Re: Limit within groups
>
>On Tue, Jan 6, 2009
On Tue, Jan 6, 2009 at 3:13 PM, Jerry Schwartz
wrote:
> Each account has multiple customers, and each customer has multiple sales. I
> want to get the top 20 customers for each account.
http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/
Keep reading, it ta
] On Behalf Of
> >Phil
> >Sent: Tuesday, January 06, 2009 3:41 PM
> >To: Jerry Schwartz
> >Cc: mysql@lists.mysql.com
> >Subject: Re: Limit within groups
> >
> >How about something like
> >
> >select account,customer,max(total) from (
>-Original Message-
>From: freedc@gmail.com [mailto:freedc@gmail.com] On Behalf Of
>Phil
>Sent: Tuesday, January 06, 2009 3:41 PM
>To: Jerry Schwartz
>Cc: mysql@lists.mysql.com
>Subject: Re: Limit within groups
>
>How about something like
>
>
for each account.
>
>
>
> If I simply do "GROUP BY account, customer LIMIT 20", I'll get the first 20
> customers for the first account. If I try "GROUP BY account, customer ORDER
> BY SUM(sale_amount) DESC LIMIT 20", I'll get the top 20 customers.
"GROUP BY account, customer LIMIT 20", I'll get the first 20
customers for the first account. If I try "GROUP BY account, customer ORDER
BY SUM(sale_amount) DESC LIMIT 20", I'll get the top 20 customers.
What am I missing?
Regards,
Jerry Schwartz
The Infoshop
lowed range of values for the
> open-files-limit and the table_cache settings. The documentation
> states that the range of values allowed for open-files-limit is
> 0-65535 and for table_cache it is 1-524288.
>
> Where I get confused is that from my understanding each table in the
>
tructuring your query like this:
select * from (
select * from containers where upload_date < 1209208414 and
category_id =
120 order by upload_date desc ) as filter
limit 175,25
Technically, it's the same query and should return the same results.
It will be a little more intensiv
01 sec)
And I have queries like these:
select * from containers where upload_date < 1209208414 and category_id =
120 order by upload_date desc limit 0,25
and
select * from containers where upload_date < 1209208414 and category_id =
120 order by upload_date desc limit 175,25
These queri
Looks like you're missing a comma after "comm_id", before
the @num := line?
andy
Santosh Killedar wrote:
I am trying the following code on 4.1.2 and getting a
syntax error that I could not figure out. It works
fine on 5.x. Any suggestion/alternate
CREATE TEMPORARY TABLE Temp
(Node INT,
comm_i
I am trying the following code on 4.1.2 and getting a
syntax error that I could not figure out. It works
fine on 5.x. Any suggestion/alternate
CREATE TEMPORARY TABLE Temp
(Node INT,
comm_id INT, INDEX USING BTREE (comm_id))
ENGINE = MyISAM;
INSERT INTO Temp
SELECT recipient, id
FROM `main_gue
deID, @last + 1, 1)) is
> not null
>and (@NodeID := NodeID) is not null
>and (@last > @keeplast)
> ;
>
>
> -Original Message-
> From: joe [mailto:[EMAIL PROTECTED]
> Sent: Saturday, February 16, 2008 8:12 PM
> To: 'Santosh Killedar'
>
I have a MYsql table with following columns Node ID,
Comment ID, Text, Date. Coment ID is primary key. For
each Node ID there are one or more comment IDs
(comments). There is a threshold (max_comments) that a
node can have. How can I delete oldest comments
associated with those nodes where this thr
On Feb 6, 2008 6:40 AM, Britske <[EMAIL PROTECTED]> wrote:
> SELECT * FROM prices WHERE prices.productid IN (SELECT id FROM priducts
> ORDER BY id LIMIT 0, 1000)
>
> However, I'm getting an error-message stating that Limit is not allowed in a
> subquery.
> How wou
e correctly I need to be sure that
> all prices of a certain product are contained in the same chunk.
>
> To me it seemd logical to do something like this:
>
> SELECT * FROM prices WHERE prices.productid IN (SELECT id FROM priducts
> ORDER BY id LIMIT 0, 1000)
>
> However, I
To me it seemd logical to do something like this:
SELECT * FROM prices WHERE prices.productid IN (SELECT id FROM priducts
ORDER BY id LIMIT 0, 1000)
However, I'm getting an error-message stating that Limit is not allowed in a
subquery.
How would you approach this?
Thanks,
Geert-Jan
--
explorer error 89
> Comp4print job 65
>
> Each computer might have a hundred different types of errors and a
> thousand entries in the table.
>
> I thought the sql would be something like:
>
> Select computername, event, count(event) and numb_tim
table.
I thought the sql would be something like:
Select computername, event, count(event) and numb_times, from eventtbl
group by computername, event order by computername, numb_times limit 3;
But that wasn't the answer. Can I do this is one sql statement? Or am
I going to have to make temp
The variable 'group_concat_max_len' has a default of 1024 (1K)
Add this to you're my.cnf to make it 8K
[mysqld]
group_concat_max_len=8192
--
Another way without altering 'group_concat_max_len' is
To manually concatenate the string pieces with blanks in
learnt.
On Jan 8, 2008 2:11 PM, Werner Puschitz <[EMAIL PROTECTED]> wrote:
> Andrey Dmitriev wrote:
> > All,
> >
> > We are using group_concat but there seems to be some sort of display
> > limit.
> > Is there are a way to unset or increase it?
> >
Andrey Dmitriev wrote:
> All,
>
> We are using group_concat but there seems to be some sort of display
> limit.
> Is there are a way to unset or increase it?
>
> Thanks,
> Andrey
>
You can change the maximum length by setting the group_concat_max_len
system varia
You should change your sql to related sub query.
On Jan 8, 2008 1:34 PM, Andrey Dmitriev <[EMAIL PROTECTED]> wrote:
> All,
>
> We are using group_concat but there seems to be some sort of display
> limit.
> Is there are a way to unset or increase it?
>
> Thanks,
>
All,
We are using group_concat but there seems to be some sort of display
limit.
Is there are a way to unset or increase it?
Thanks,
Andrey
off avoiding this
complication. At the very least, I'd avoid joining things that can't
be joined.
> Your suggestion does help somewhat. Changing the subqueries to a count of
> limited subqueries reduced a large sample query from 9 seconds down to 5
> seconds. We need to get
t; like these should be separate queries.
>
>> This query is being run against a database that currently as 100 Million
>> records (and rapidly growing), and if TotCount is over about 50,000, the
>> query is unacceptably slow. We need to LIMIT the subqueries to some
>> ma
As an example:
Hmm. Why are you joining these? There's nothing to join. It looks
like these should be separate queries.
> This query is being run against a database that currently as 100 Million
> records (and rapidly growing), and if TotCount is over about 50,000, the
> query is
M
(
SELECT Col1 FROM Table WHERE Col1 = X and Col2 > Y and Col3 < Z LIMIT 1, 30
) Main
INNER JOIN
(
SELECT COUNT(*) AS TotCount FROM Table
) NoFilter
INNER JOIN
(
SELECT COUNT(*) AS SubCount WHERE Col2 > Y
) Filter1
ETC.
This query is being run against a database that currently as 100 M
> View this message in context:
> http://www.nabble.com/Applying-LIMIT-to-SELECT-count%28*%29-tp14453544p14459808.html
>
> Sent from the MySQL - General mailing list archive at Nabble.com.
>
>
> --
> MySQL General Mailing List
> For list archives: http://lists.mysql.com
The problem is that there are certain conditions after WHERE different for
each query and the results number can be very different.
--
View this message in context:
http://www.nabble.com/Applying-LIMIT-to-SELECT-count%28*%29-tp14453544p14459808.html
Sent from the MySQL - General mailing list
If exact number isn't important,
you might want to try table_rows in information_schema.tables or show
table status.
On Dec 21, 2007 7:53 PM, Urms <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> My task is to limit calculation of total number of items in the database
> that sat
Hi,
My task is to limit calculation of total number of items in the database
that satisfy certain conditions. I join two tables using WHERE and there are
millions of records as the result. When I do SELECT count(*) it takes
really too long. The table has appropriate indexes and I
Hi,
On Dec 14, 2007 1:02 PM, J Trahair <[EMAIL PROTECTED]> wrote:
> Hi Everyone
>
> I have a database with an OrderItems table, containing (at least) 3 fields,
> namely ExtendedPurchasePrice, CurrencyConversion and
> ExtendedPurchasePriceSterling, all fields as doubles.
>
> I want to update Exte
Hi Everyone
I have a database with an OrderItems table, containing (at least) 3 fields,
namely ExtendedPurchasePrice, CurrencyConversion and
ExtendedPurchasePriceSterling, all fields as doubles.
I want to update ExtendedPurchasePriceSterling for each row with the result of
the calculation
Ext
-afan
>
>
>
> barry wrote:
> > I'm assuming you're talking about the Mysql Query Browser?
> >
> > You can change the number of records under Tools-> Preferences and
> > changing the "Max Rows For Generated Queries" to whatever you wan
ords under Tools-> Preferences and
changing the "Max Rows For Generated Queries" to whatever you want, set
to zero removes the limit entirely.
On Sat, 2007-12-01 at 15:17 -0600, Afan Pasalic wrote:
Hi,
on Linux version of MySQL Browser (v 1.2.4 beta), when double-click on
any table, default q
I'm assuming you're talking about the Mysql Query Browser?
You can change the number of records under Tools-> Preferences and
changing the "Max Rows For Generated Queries" to whatever you want, set
to zero removes the limit entirely.
On Sat, 2007-12-01 at 15:17 -0600, A
Hi,
on Linux version of MySQL Browser (v 1.2.4 beta), when double-click on
any table, default query is
SELECT * FROM LIMIT 0,1000
On Win version (v 1.2.9 rc), there is no LIMIT part - what caused me to
pull so many times tens, even hundreds thousands of records.
I was looking for in setting
Y person_id ORDER
BY ranking DESC
My goal is to sum 7 greatest results for each person.
In more general, my question is: is there a way to limit number of
records within groups in "group by" query.
Try this:
http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstlea
nking DESC
My goal is to sum 7 greatest results for each person.
In more general, my question is: is there a way to limit number of
records within groups in "group by" query.
Try this:
http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/
is there a way to limit number of
records within groups in "group by" query.
Try this:
http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/
Cheers
Baron
--
Best regards,
Miroslav Monkevic
--
MySQL General Mailing List
Fo
results GROUP BY person_id ORDER BY
ranking DESC
My goal is to sum 7 greatest results for each person.
In more general, my question is: is there a way to limit number of
records within groups in "group by" query.
Thank you!
It is set in mysql's config file.
Have you traced into your program?
Albert Sanchez:
> Is there a limit of connections (open and close) that mysql can carry? or a
> limit by second?
>
> I have a big memory crash (double free or corruption) in my program and I
> smell th
Is there a limit of connections (open and close) that mysql can carry? or a
limit by second?
I have a big memory crash (double free or corruption) in my program and I
smell that it could be mysql,
thanks a lot,
Albert
Hi,
Miroslav Monkevic wrote:
Hello,
MySQL 4.1
I have query:
SELECT SUM(points) as ranking FROM results GROUP BY person_id ORDER BY
ranking DESC
My goal is to sum 7 greatest results for each person.
In more general, my question is: is there a way to limit number of
records within groups
Hello,
MySQL 4.1
I have query:
SELECT SUM(points) as ranking FROM results GROUP BY person_id ORDER BY
ranking DESC
My goal is to sum 7 greatest results for each person.
In more general, my question is: is there a way to limit number of
records within groups in "group by" quer
At 12:40 AM 8/22/2007, [EMAIL PROTECTED] wrote:
Hi all,
Is it possible to do query which limiting the result into some words
only? i.e the complete sentence is "I am able to login with the account"
and I just want to view "I am able to login..." Many thanks for any
reply.
Regards,
Willy
Will
Hi all,
Is it possible to do query which limiting the result into some words
only? i.e the complete sentence is "I am able to login with the account"
and I just want to view "I am able to login..." Many thanks for any
reply.
Regards,
Willy
--
www.sangprabv.web.id
www.binbit.co.id
--
MySQL Ge
At 04:26 PM 7/12/2007, Mukul Sabharwal wrote:
Hello,
Is the query_cache a cache for *exact* queries -- exactness here
refers to as determined by the query plan. Or is it word for word?
It is word for word, and is case sensitive.
Query in question, SELECT * FROM tbl WHERE ... LIMIT 100;
as
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