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Expland and slow-query don't agree  
1,955
Aram Mirzadeh
08/03/2014 06:24AM
Re: Expland and slow-query don't agree  
996
Rick James
08/04/2014 01:23PM
Query not using index sporadically  
2,441
Vinay NP
06/13/2014 07:51AM
Re: Query not using index sporadically  
1,082
Rick James
06/18/2014 02:48PM
[HELP] Subquery Optimization  
2,195
Pinoy Central
05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements  
1,740
Edwin Desouza
05/15/2014 12:29PM
BETWEEN a DATE and a hard place  
2,027
Gerald Bayles
04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place  
1,066
Rick James
04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place  
1,144
Gerald Bayles
04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place  
1,101
Rick James
04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place  
1,258
Gerald Bayles
04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place  
1,049
Rick James
04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place  
1,093
Gerald Bayles
04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place  
1,154
Gerald Bayles
05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place  
1,195
Rick James
05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7  
1,779
Edwin Desouza
04/22/2014 10:03AM
Access mysql blob data from stored procedure  
3,068
Kalpesh g
04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure  
1,226
Peter Brawley
04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
3,522
Andre Mikulec
03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,468
Rick James
03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,367
Rick James
03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day  
3,163
Blake Harps
02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,319
Øystein Grøvlen
02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,397
Mattias Jonsson
02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,383
Blake Harps
02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,292
Blake Harps
02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,183
Edwin Desouza
02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,269
Rick James
02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,252
Blake Harps
03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,376
Mattias Jonsson
02/17/2014 04:29PM
Subquery with range uses filesort  
3,867
David Marcus
11/16/2013 02:42PM
Re: Subquery with range uses filesort  
1,384
Rick James
11/17/2013 07:42PM
Re: Subquery with range uses filesort  
1,385
David Marcus
11/17/2013 08:01PM
Re: Subquery with range uses filesort  
1,370
Rick James
11/18/2013 04:33PM
Re: Subquery with range uses filesort  
1,910
David Marcus
11/18/2013 07:54PM
Re: Subquery with range uses filesort  
1,579
Rick James
11/19/2013 04:10PM
Re: Subquery with range uses filesort  
1,454
David Marcus
11/19/2013 08:36PM
Re: Subquery with range uses filesort  
1,549
Rick James
11/21/2013 02:55PM
Re: Subquery with range uses filesort  
1,753
David Marcus
12/05/2013 03:46PM
Re: Subquery with range uses filesort  
1,392
Rick James
12/07/2013 02:10PM
Re: Subquery with range uses filesort  
1,367
David Marcus
12/09/2013 06:08PM
Re: Subquery with range uses filesort  
1,377
David Marcus
12/14/2013 09:51PM
Re: Subquery with range uses filesort  
1,337
David Marcus
12/14/2013 10:17PM
Re: Subquery with range uses filesort  
1,423
Rick James
12/15/2013 11:29PM
Re: Subquery with range uses filesort  
1,450
David Marcus
12/17/2013 06:58PM
Re: Subquery with range uses filesort  
1,380
Rick James
12/18/2013 05:49PM
Re: Subquery with range uses filesort  
1,417
David Marcus
12/18/2013 08:28PM
Re: Subquery with range uses filesort  
1,481
Rick James
12/19/2013 10:13PM
Re: Subquery with range uses filesort  
1,458
David Marcus
12/19/2013 10:28PM
Re: Subquery with range uses filesort  
1,312
Rick James
12/20/2013 07:06PM
Re: Subquery with range uses filesort  
1,395
David Marcus
12/21/2013 07:36AM
Re: Subquery with range uses filesort  
1,436
Rick James
12/22/2013 10:01AM
Re: Subquery with range uses filesort  
1,496
David Marcus
12/22/2013 10:45AM
Re: Subquery with range uses filesort  
1,359
David Marcus
12/25/2013 09:30PM
Optimizer executes inperformant subquery first  
3,356
Martin Kirchner
12/06/2013 07:12AM
Re: Optimizer executes inperformant subquery first  
1,321
Rick James
12/07/2013 02:30PM
Re: Optimizer executes inperformant subquery first  
1,558
Martin Kirchner
12/07/2013 03:49PM
Re: Optimizer executes inperformant subquery first  
1,650
Øystein Grøvlen
12/09/2013 09:48AM
Re: Optimizer executes inperformant subquery first  
1,528
Martin Kirchner
12/18/2013 03:04AM
Re: Optimizer executes inperformant subquery first  
1,343
Øystein Grøvlen
12/19/2013 02:45AM
Re: Optimizer executes inperformant subquery first  
1,285
Martin Kirchner
12/20/2013 02:24AM
Re: Optimizer executes inperformant subquery first  
1,236
Øystein Grøvlen
12/23/2013 08:07AM
Re: Optimizer executes inperformant subquery first  
1,232
Rick James
12/23/2013 01:11PM
Re: Optimizer executes inperformant subquery first  
1,325
Martin Kirchner
12/18/2013 05:16AM
Re: Optimizer executes inperformant subquery first  
1,365
Rick James
12/18/2013 06:49PM
Re: Optimizer executes inperformant subquery first  
1,291
Øystein Grøvlen
12/19/2013 02:49AM
my.cnf  
2,222
Juan Medina
10/27/2013 02:08PM
Re: my.cnf  
1,111
Rick James
10/29/2013 07:12PM
my.cnf optimization please help  
3,670
Ivan Kratunkov
10/28/2013 03:39AM
Re: my.cnf optimization please help  
1,292
Rick James
10/29/2013 07:10PM
MySQL Optimizer: Features in MySQL 5.7  
1,881
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
2,181
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
1,155
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
1,128
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
1,158
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
2,373
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,432
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,467
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,398
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,365
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,296
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,207
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,236
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,547
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
2,876
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,170
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
1,172
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
2,352
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
1,180
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
3,609
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,657
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,390
Rick James
08/31/2013 04:13PM
query index not used  
1,844
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
1,043
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
2,600
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,346
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
1,151
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
1,090
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
1,140
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
1,158
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
1,236
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
1,147
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
2,075
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
1,028
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
3,745
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,581
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,537
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,388
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,428
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,374
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,528
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,702
Rick James
06/04/2013 11:49PM
Query optimization  
2,595
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,268
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,227
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,245
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,357
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,282
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,232
Rick James
05/17/2013 11:47PM
Re: Query optimization  
1,136
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,252
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
1,913
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
3,155
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,242
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
6,532
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
1,910
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
1,880
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,667
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
1,874
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,589
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,614
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
2,066
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,577
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,535
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,625
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,529
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,548
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,446
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,482
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,565
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
2,082
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,566
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
1,673
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,595
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,602
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
2,645
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,452
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,404
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,444
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
1,956
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
8,325
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
2,923
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
2,079
Edwin Desouza
01/22/2013 05:58PM
Can we expect an enhancement for derived table merge optimization?  
3,777
Michael Hogue
01/04/2013 12:04PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,513
Rick James
01/07/2013 10:50PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,933
Roy Lyseng
01/11/2013 09:18AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,340
Rick James
01/13/2013 12:24PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,514
Roy Lyseng
01/14/2013 08:43AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,315
Rick James
01/14/2013 09:54AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,437
Roy Lyseng
01/15/2013 06:15AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,331
Roy Lyseng
01/11/2013 08:51AM
How to best optimize MYSQL Database  
2,368
Muhammad Usman
12/10/2012 03:45AM
Re: How to best optimize MYSQL Database  
1,276
Rick James
12/21/2012 12:49PM
mysql subquery query optimization question  
2,647
Yong Yim
01/12/2013 09:24AM
Re: mysql subquery query optimization question  
1,223
Rick James
01/13/2013 11:30AM
Create a New Datatype  
2,323
Andy Gurzynski
01/06/2013 01:00AM
Re: Create a New Datatype  
1,159
Rick James
01/07/2013 11:01PM
MySQL Optimizer: InnoDB extended secondary keys  
2,316
Edwin Desouza
12/21/2012 12:12PM
Optimizer for innodb does not reduce "data_free"  
4,389
Sebastian Schött
12/06/2012 03:39AM
Re: Optimizer for innodb does not reduce "data_free"  
1,687
Rick James
12/08/2012 01:33PM
Complex query - need advise  
2,705
chris boer
11/03/2012 04:16PM
Re: Complex query - need advise  
1,332
chris boer
11/03/2012 04:24PM
Re: Complex query - need advise  
1,310
chris boer
11/04/2012 10:05AM
Re: Complex query - need advise  
1,604
Rick James
11/05/2012 11:12AM
Follow up on "Query Execution Plan"  
2,271
Chris Slominski
10/24/2012 11:59AM
Re: Follow up on "Query Execution Plan"  
1,267
Chris Slominski
10/25/2012 11:14AM
Re: Follow up on "Query Execution Plan"  
1,117
Chris Slominski
10/25/2012 06:15AM
JOIN query too slow  
2,357
N. Kovac
10/13/2012 11:52AM
Re: JOIN query too slow  
1,162
Peter Brawley
10/14/2012 10:26AM
Re: JOIN query too slow  
1,214
Rick James
10/16/2012 07:48PM
bulk update very slow  
4,741
james che
09/25/2012 02:51PM
Re: bulk update very slow  
1,820
james che
09/26/2012 02:58PM
Re: bulk update very slow  
1,860
Rick James
09/27/2012 08:19PM
Re: bulk update very slow  
2,875
Jørgen Løland
09/27/2012 12:01PM
Why Query Cache Actived Returns Wrong Results?  
2,761
Daniel Estrada
09/22/2012 08:57PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,544
Rick James
09/23/2012 03:46PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,494
Daniel Estrada
09/23/2012 08:24PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,165
Rick James
09/24/2012 11:43PM
Join? Union? I am so lost.  
2,162
Hank Reardon
09/17/2012 09:09AM
Re: Join? Union? I am so lost.  
1,144
Rick James
09/18/2012 07:48AM
How make indexes work with group by statement  
2,115
Adnan Raza
09/13/2012 12:48AM
Re: How make indexes work with group by statement  
1,210
Rick James
09/15/2012 10:34PM
Re: How make indexes work with group by statement  
1,265
Jørgen Løland
09/13/2012 01:50AM
Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
2,544
Dominik Bieringer
09/05/2012 02:57AM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,154
Rick James
09/06/2012 10:42PM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,261
Øystein Grøvlen
09/06/2012 04:32AM
optimize the query  
2,287
ch srinivas
08/27/2012 10:47PM
Re: optimize the query  
1,184
Øystein Grøvlen
08/28/2012 01:43AM
Re: optimize the query  
1,082
ch srinivas
08/29/2012 04:15AM
Re: optimize the query  
1,144
Øystein Grøvlen
08/29/2012 04:39AM
Re: optimize the query  
1,058
ch srinivas
08/29/2012 05:38AM
Re: optimize the query  
1,124
Rick James
08/30/2012 07:20AM
Query with GROUP BY not using Index  
2,741
Imran Akbar
08/14/2012 01:06PM
Re: Query with GROUP BY not using Index  
1,322
Øystein Grøvlen
08/15/2012 02:46AM
Re: Query with GROUP BY not using Index  
1,251
Imran Akbar
08/16/2012 10:30AM
Re: Query with GROUP BY not using Index  
1,521
Øystein Grøvlen
08/17/2012 02:58AM
Re: Query with GROUP BY not using Index  
1,268
Rick James
08/18/2012 10:30PM
Re: Query with GROUP BY not using Index  
1,198
Imran Akbar
08/24/2012 12:41PM
Re: Query with GROUP BY not using Index  
1,279
Øystein Grøvlen
08/28/2012 03:11AM
Re: Query with GROUP BY not using Index  
1,334
Imran Akbar
08/28/2012 06:21PM
Re: Query with GROUP BY not using Index  
1,691
Øystein Grøvlen
08/29/2012 01:28AM
Re: Query with GROUP BY not using Index  
1,172
Imran Akbar
08/29/2012 10:36AM
CONCAT and Index in where clause  
15,122
Aurelien PANIZZA
08/22/2012 08:45AM
Re: CONCAT and Index in where clause  
5,214
Øystein Grøvlen
08/23/2012 01:15AM
Re: CONCAT and Index in where clause  
4,011
Rick James
08/23/2012 09:13PM
Re: CONCAT and Index in where clause  
4,083
Aurelien PANIZZA
08/27/2012 09:53AM
Re: CONCAT and Index in where clause  
4,055
Øystein Grøvlen
08/28/2012 02:50AM
Simple query spending too much time in 'statistics' state without reason  
11,852
Vincent B.
08/21/2012 06:19AM
Re: Simple query spending too much time in 'statistics' state without reason  
6,308
Jørgen Løland
08/24/2012 06:24AM
Re: Simple query spending too much time in 'statistics' state without reason  
4,610
Vincent B.
08/28/2012 01:53AM
Re: Simple query spending too much time in 'statistics' state without reason  
5,929
Rick James
08/22/2012 07:44PM
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