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Posted
How could this SQL be optimized?  
1,912
feng guo
05/29/2014 11:26PM
Re: How could this SQL be optimized?  
954
Øystein Grøvlen
05/30/2014 02:41AM
Re: How could this SQL be optimized?  
1,023
feng guo
05/30/2014 02:46AM
Re: How could this SQL be optimized?  
880
Marion Gordon
08/21/2014 11:03PM
Re: How could this SQL be optimized?  
885
Øystein Grøvlen
08/22/2014 01:54AM
simple uses of order by datetime keep causing 'using filesort'  
1,946
park albert
08/19/2014 05:44PM
Re: simple uses of order by datetime keep causing 'using filesort'  
1,035
Rick James
08/20/2014 07:34PM
Expland and slow-query don't agree  
1,706
Aram Mirzadeh
08/03/2014 06:24AM
Re: Expland and slow-query don't agree  
840
Rick James
08/04/2014 01:23PM
Query not using index sporadically  
2,036
Vinay NP
06/13/2014 07:51AM
Re: Query not using index sporadically  
937
Rick James
06/18/2014 02:48PM
[HELP] Subquery Optimization  
1,972
Pinoy Central
05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements  
1,527
Edwin Desouza
05/15/2014 12:29PM
BETWEEN a DATE and a hard place  
1,795
Gerald Bayles
04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place  
905
Rick James
04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place  
967
Gerald Bayles
04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place  
971
Rick James
04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place  
1,084
Gerald Bayles
04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place  
894
Rick James
04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place  
931
Gerald Bayles
04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place  
982
Gerald Bayles
05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place  
1,031
Rick James
05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7  
1,594
Edwin Desouza
04/22/2014 10:03AM
Access mysql blob data from stored procedure  
2,427
Kalpesh g
04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure  
1,017
Peter Brawley
04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
2,718
Andre Mikulec
03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,248
Rick James
03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,143
Rick James
03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day  
2,770
Blake Harps
02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,124
Øystein Grøvlen
02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,213
Mattias Jonsson
02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,180
Blake Harps
02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,091
Blake Harps
02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,054
Edwin Desouza
02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,119
Rick James
02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,085
Blake Harps
03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,172
Mattias Jonsson
02/17/2014 04:29PM
Subquery with range uses filesort  
3,144
David Marcus
11/16/2013 02:42PM
Re: Subquery with range uses filesort  
1,207
Rick James
11/17/2013 07:42PM
Re: Subquery with range uses filesort  
1,176
David Marcus
11/17/2013 08:01PM
Re: Subquery with range uses filesort  
1,166
Rick James
11/18/2013 04:33PM
Re: Subquery with range uses filesort  
1,676
David Marcus
11/18/2013 07:54PM
Re: Subquery with range uses filesort  
1,330
Rick James
11/19/2013 04:10PM
Re: Subquery with range uses filesort  
1,242
David Marcus
11/19/2013 08:36PM
Re: Subquery with range uses filesort  
1,336
Rick James
11/21/2013 02:55PM
Re: Subquery with range uses filesort  
1,534
David Marcus
12/05/2013 03:46PM
Re: Subquery with range uses filesort  
1,152
Rick James
12/07/2013 02:10PM
Re: Subquery with range uses filesort  
1,174
David Marcus
12/09/2013 06:08PM
Re: Subquery with range uses filesort  
1,173
David Marcus
12/14/2013 09:51PM
Re: Subquery with range uses filesort  
1,153
David Marcus
12/14/2013 10:17PM
Re: Subquery with range uses filesort  
1,232
Rick James
12/15/2013 11:29PM
Re: Subquery with range uses filesort  
1,224
David Marcus
12/17/2013 06:58PM
Re: Subquery with range uses filesort  
1,165
Rick James
12/18/2013 05:49PM
Re: Subquery with range uses filesort  
1,190
David Marcus
12/18/2013 08:28PM
Re: Subquery with range uses filesort  
1,270
Rick James
12/19/2013 10:13PM
Re: Subquery with range uses filesort  
1,222
David Marcus
12/19/2013 10:28PM
Re: Subquery with range uses filesort  
1,108
Rick James
12/20/2013 07:06PM
Re: Subquery with range uses filesort  
1,208
David Marcus
12/21/2013 07:36AM
Re: Subquery with range uses filesort  
1,229
Rick James
12/22/2013 10:01AM
Re: Subquery with range uses filesort  
1,280
David Marcus
12/22/2013 10:45AM
Re: Subquery with range uses filesort  
1,135
David Marcus
12/25/2013 09:30PM
Optimizer executes inperformant subquery first  
2,861
Martin Kirchner
12/06/2013 07:12AM
Re: Optimizer executes inperformant subquery first  
1,096
Rick James
12/07/2013 02:30PM
Re: Optimizer executes inperformant subquery first  
1,364
Martin Kirchner
12/07/2013 03:49PM
Re: Optimizer executes inperformant subquery first  
1,487
Øystein Grøvlen
12/09/2013 09:48AM
Re: Optimizer executes inperformant subquery first  
1,270
Martin Kirchner
12/18/2013 03:04AM
Re: Optimizer executes inperformant subquery first  
1,200
Øystein Grøvlen
12/19/2013 02:45AM
Re: Optimizer executes inperformant subquery first  
1,086
Martin Kirchner
12/20/2013 02:24AM
Re: Optimizer executes inperformant subquery first  
1,037
Øystein Grøvlen
12/23/2013 08:07AM
Re: Optimizer executes inperformant subquery first  
1,065
Rick James
12/23/2013 01:11PM
Re: Optimizer executes inperformant subquery first  
1,179
Martin Kirchner
12/18/2013 05:16AM
Re: Optimizer executes inperformant subquery first  
1,183
Rick James
12/18/2013 06:49PM
Re: Optimizer executes inperformant subquery first  
1,103
Øystein Grøvlen
12/19/2013 02:49AM
my.cnf  
2,016
Juan Medina
10/27/2013 02:08PM
Re: my.cnf  
993
Rick James
10/29/2013 07:12PM
my.cnf optimization please help  
3,180
Ivan Kratunkov
10/28/2013 03:39AM
Re: my.cnf optimization please help  
1,138
Rick James
10/29/2013 07:10PM
MySQL Optimizer: Features in MySQL 5.7  
1,681
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
1,929
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
1,039
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
1,014
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
1,029
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
2,116
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,223
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,313
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,244
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,208
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,112
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,091
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,089
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,345
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
2,516
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,063
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
1,053
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
2,047
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
1,030
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
3,157
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,484
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,225
Rick James
08/31/2013 04:13PM
query index not used  
1,666
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
931
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
2,267
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,213
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
1,036
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
958
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
1,012
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
1,023
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
1,097
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
1,017
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
1,861
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
920
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
3,239
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,392
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,313
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,243
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,147
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,198
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,320
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,451
Rick James
06/04/2013 11:49PM
Query optimization  
2,292
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,133
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,087
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,104
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,173
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,104
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,110
Rick James
05/17/2013 11:47PM
Re: Query optimization  
1,006
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,100
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
1,750
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
2,817
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,107
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
5,787
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
1,518
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
1,536
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,338
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
1,426
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,268
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,259
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
1,692
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,358
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,288
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,359
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,322
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,345
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,232
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,263
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,338
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
1,821
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,326
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
1,400
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,360
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,368
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
2,357
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,272
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,257
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,331
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
1,789
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
7,399
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
2,625
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
1,903
Edwin Desouza
01/22/2013 05:58PM
Can we expect an enhancement for derived table merge optimization?  
3,303
Michael Hogue
01/04/2013 12:04PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,314
Rick James
01/07/2013 10:50PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,716
Roy Lyseng
01/11/2013 09:18AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,175
Rick James
01/13/2013 12:24PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,311
Roy Lyseng
01/14/2013 08:43AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,155
Rick James
01/14/2013 09:54AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,243
Roy Lyseng
01/15/2013 06:15AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,172
Roy Lyseng
01/11/2013 08:51AM
How to best optimize MYSQL Database  
2,180
Muhammad Usman
12/10/2012 03:45AM
Re: How to best optimize MYSQL Database  
1,170
Rick James
12/21/2012 12:49PM
mysql subquery query optimization question  
2,405
Yong Yim
01/12/2013 09:24AM
Re: mysql subquery query optimization question  
1,107
Rick James
01/13/2013 11:30AM
Create a New Datatype  
2,094
Andy Gurzynski
01/06/2013 01:00AM
Re: Create a New Datatype  
1,043
Rick James
01/07/2013 11:01PM
MySQL Optimizer: InnoDB extended secondary keys  
2,112
Edwin Desouza
12/21/2012 12:12PM
Optimizer for innodb does not reduce "data_free"  
3,788
Sebastian Schött
12/06/2012 03:39AM
Re: Optimizer for innodb does not reduce "data_free"  
1,485
Rick James
12/08/2012 01:33PM
Complex query - need advise  
2,434
chris boer
11/03/2012 04:16PM
Re: Complex query - need advise  
1,207
chris boer
11/03/2012 04:24PM
Re: Complex query - need advise  
1,154
chris boer
11/04/2012 10:05AM
Re: Complex query - need advise  
1,490
Rick James
11/05/2012 11:12AM
Follow up on "Query Execution Plan"  
2,048
Chris Slominski
10/24/2012 11:59AM
Re: Follow up on "Query Execution Plan"  
1,122
Chris Slominski
10/25/2012 11:14AM
Re: Follow up on "Query Execution Plan"  
975
Chris Slominski
10/25/2012 06:15AM
JOIN query too slow  
2,144
N. Kovac
10/13/2012 11:52AM
Re: JOIN query too slow  
1,041
Peter Brawley
10/14/2012 10:26AM
Re: JOIN query too slow  
1,078
Rick James
10/16/2012 07:48PM
bulk update very slow  
4,417
james che
09/25/2012 02:51PM
Re: bulk update very slow  
1,634
james che
09/26/2012 02:58PM
Re: bulk update very slow  
1,606
Rick James
09/27/2012 08:19PM
Re: bulk update very slow  
2,012
Jørgen Løland
09/27/2012 12:01PM
Why Query Cache Actived Returns Wrong Results?  
2,367
Daniel Estrada
09/22/2012 08:57PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,276
Rick James
09/23/2012 03:46PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,299
Daniel Estrada
09/23/2012 08:24PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,027
Rick James
09/24/2012 11:43PM
Join? Union? I am so lost.  
1,996
Hank Reardon
09/17/2012 09:09AM
Re: Join? Union? I am so lost.  
1,037
Rick James
09/18/2012 07:48AM
How make indexes work with group by statement  
1,932
Adnan Raza
09/13/2012 12:48AM
Re: How make indexes work with group by statement  
1,070
Rick James
09/15/2012 10:34PM
Re: How make indexes work with group by statement  
1,110
Jørgen Løland
09/13/2012 01:50AM
Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
2,329
Dominik Bieringer
09/05/2012 02:57AM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,021
Rick James
09/06/2012 10:42PM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,110
Øystein Grøvlen
09/06/2012 04:32AM
optimize the query  
2,107
ch srinivas
08/27/2012 10:47PM
Re: optimize the query  
1,076
Øystein Grøvlen
08/28/2012 01:43AM
Re: optimize the query  
963
ch srinivas
08/29/2012 04:15AM
Re: optimize the query  
1,029
Øystein Grøvlen
08/29/2012 04:39AM
Re: optimize the query  
941
ch srinivas
08/29/2012 05:38AM
Re: optimize the query  
1,009
Rick James
08/30/2012 07:20AM
Query with GROUP BY not using Index  
2,449
Imran Akbar
08/14/2012 01:06PM
Re: Query with GROUP BY not using Index  
1,143
Øystein Grøvlen
08/15/2012 02:46AM
Re: Query with GROUP BY not using Index  
1,092
Imran Akbar
08/16/2012 10:30AM
Re: Query with GROUP BY not using Index  
1,243
Øystein Grøvlen
08/17/2012 02:58AM
Re: Query with GROUP BY not using Index  
1,101
Rick James
08/18/2012 10:30PM
Re: Query with GROUP BY not using Index  
1,039
Imran Akbar
08/24/2012 12:41PM
Re: Query with GROUP BY not using Index  
1,124
Øystein Grøvlen
08/28/2012 03:11AM
Re: Query with GROUP BY not using Index  
1,146
Imran Akbar
08/28/2012 06:21PM
Re: Query with GROUP BY not using Index  
1,460
Øystein Grøvlen
08/29/2012 01:28AM
Re: Query with GROUP BY not using Index  
1,046
Imran Akbar
08/29/2012 10:36AM
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