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foreign key creation in a huge database  
2,452
Raffael Vendrametto
03/05/2015 04:05PM
Please do NOT duplicate posts  
1,161
Peter Brawley
03/05/2015 05:42PM
Query Taking 2.5hrs on 5.6.20 version  
2,882
ch srinivas
03/04/2015 01:30AM
Re: Query Taking 2.5hrs on 5.6.20 version  
1,319
Peter Brawley
03/04/2015 12:15PM
Re: Query Taking 2.5hrs on 5.6.20 version  
1,237
Rick James
03/04/2015 08:18PM
Query optimisation advice  
2,552
Paul Feely
01/08/2015 11:02PM
Re: Query optimisation advice  
1,330
Rick James
01/10/2015 01:22AM
Re: Query optimisation advice  
1,251
Paul Feely
01/11/2015 05:50PM
Re: Query optimisation advice  
1,313
Rick James
01/12/2015 10:35PM
actual Size calculation of mysql table (engine innodb)  
2,514
Afaque Ahmad Siddiqui
12/10/2014 09:38AM
Re: actual Size calculation of mysql table (engine innodb)  
1,389
Rick James
12/12/2014 08:32PM
Re: actual Size calculation of mysql table (engine innodb)  
1,498
Rick James
12/12/2014 08:36PM
MySQL cash optimization  
2,782
Sasha Katsman
11/27/2014 06:33AM
Re: MySQL cash optimization  
1,633
Peter Brawley
11/27/2014 04:34PM
Re: MySQL cash optimization  
1,326
Sasha Katsman
12/09/2014 04:33AM
Re: MySQL cache optimization  
1,198
Peter Brawley
12/09/2014 12:28PM
how to tune for optimizer_search_depth?  
2,658
jongse park
12/03/2014 12:13AM
Re: how to tune for optimizer_search_depth?  
1,655
Rick James
12/03/2014 11:33PM
Re: how to tune for optimizer_search_depth?  
1,633
Øystein Grøvlen
12/08/2014 05:32AM
MySQL Optimizer Cost Model  
2,368
Edwin Desouza
10/24/2014 10:37AM
Need help to create index on join statments  
2,528
Neil Sorathia
10/08/2014 06:24PM
Re: Need help to create index on join statments  
1,211
Neil Sorathia
10/09/2014 09:46AM
Re: Need help to create index on join statments  
1,294
Rick James
10/11/2014 01:37PM
Better Performance for JOINs Not Using Indexes  
2,246
Edwin Desouza
10/03/2014 01:48PM
A Multi-Table Trick to Speed up Single-Table UPDATE/DELETE Statements  
2,601
Edwin Desouza
10/03/2014 01:47PM
MySQL 5.7: Optimizer Hints + Query Rewrite  
2,496
Edwin Desouza
10/01/2014 08:53AM
Intermediate Query Results  
3,642
Ashwini Singh
09/12/2014 08:37AM
Re: Intermediate Query Results  
1,733
Rick James
09/13/2014 09:23PM
Re: Intermediate Query Results  
1,781
Øystein Grøvlen
09/15/2014 05:42AM
All records scanning using "LIKe" and "IN" operaters  
2,797
ch srinivas
06/28/2014 01:43PM
Re: All records scanning using "LIKe" and "IN" operaters  
1,394
Peter Brawley
06/28/2014 02:22PM
Re: All records scanning using "LIKe" and "IN" operaters  
1,325
Øystein Grøvlen
08/28/2014 03:47PM
Help me to optimize my sql query  
2,703
GAURAV JAIN
08/21/2014 07:29AM
Re: Help me to optimize my sql query  
1,289
Rick James
08/22/2014 06:50AM
How could this SQL be optimized?  
2,642
feng guo
05/29/2014 11:26PM
Re: How could this SQL be optimized?  
1,347
Øystein Grøvlen
05/30/2014 02:41AM
Re: How could this SQL be optimized?  
1,452
feng guo
05/30/2014 02:46AM
Re: How could this SQL be optimized?  
1,275
Marion Gordon
08/21/2014 11:03PM
Re: How could this SQL be optimized?  
1,294
Øystein Grøvlen
08/22/2014 01:54AM
simple uses of order by datetime keep causing 'using filesort'  
3,117
park albert
08/19/2014 05:44PM
Re: simple uses of order by datetime keep causing 'using filesort'  
1,523
Rick James
08/20/2014 07:34PM
Expland and slow-query don't agree  
2,461
Aram Mirzadeh
08/03/2014 06:24AM
Re: Expland and slow-query don't agree  
1,325
Rick James
08/04/2014 01:23PM
Query not using index sporadically  
3,179
Vinay NP
06/13/2014 07:51AM
Re: Query not using index sporadically  
1,313
Rick James
06/18/2014 02:48PM
[HELP] Subquery Optimization  
2,716
Pinoy Central
05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements  
2,173
Edwin Desouza
05/15/2014 12:29PM
BETWEEN a DATE and a hard place  
2,495
Gerald Bayles
04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place  
1,357
Rick James
04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place  
1,466
Gerald Bayles
04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place  
1,392
Rick James
04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place  
1,579
Gerald Bayles
04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place  
1,334
Rick James
04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place  
1,385
Gerald Bayles
04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place  
1,474
Gerald Bayles
05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place  
1,476
Rick James
05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7  
2,237
Edwin Desouza
04/22/2014 10:03AM
Access mysql blob data from stored procedure  
3,803
Kalpesh g
04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure  
1,494
Peter Brawley
04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
4,744
Andre Mikulec
03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,801
Rick James
03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,690
Rick James
03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day  
3,771
Blake Harps
02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,586
Øystein Grøvlen
02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,676
Mattias Jonsson
02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,635
Blake Harps
02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,549
Blake Harps
02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,442
Edwin Desouza
02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,574
Rick James
02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,564
Blake Harps
03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,716
Mattias Jonsson
02/17/2014 04:29PM
Subquery with range uses filesort  
4,797
David Marcus
11/16/2013 02:42PM
Re: Subquery with range uses filesort  
1,671
Rick James
11/17/2013 07:42PM
Re: Subquery with range uses filesort  
1,694
David Marcus
11/17/2013 08:01PM
Re: Subquery with range uses filesort  
1,709
Rick James
11/18/2013 04:33PM
Re: Subquery with range uses filesort  
2,242
David Marcus
11/18/2013 07:54PM
Re: Subquery with range uses filesort  
1,914
Rick James
11/19/2013 04:10PM
Re: Subquery with range uses filesort  
1,796
David Marcus
11/19/2013 08:36PM
Re: Subquery with range uses filesort  
1,916
Rick James
11/21/2013 02:55PM
Re: Subquery with range uses filesort  
2,081
David Marcus
12/05/2013 03:46PM
Re: Subquery with range uses filesort  
1,700
Rick James
12/07/2013 02:10PM
Re: Subquery with range uses filesort  
1,652
David Marcus
12/09/2013 06:08PM
Re: Subquery with range uses filesort  
1,800
David Marcus
12/14/2013 09:51PM
Re: Subquery with range uses filesort  
1,633
David Marcus
12/14/2013 10:17PM
Re: Subquery with range uses filesort  
1,737
Rick James
12/15/2013 11:29PM
Re: Subquery with range uses filesort  
1,826
David Marcus
12/17/2013 06:58PM
Re: Subquery with range uses filesort  
1,731
Rick James
12/18/2013 05:49PM
Re: Subquery with range uses filesort  
1,761
David Marcus
12/18/2013 08:28PM
Re: Subquery with range uses filesort  
1,803
Rick James
12/19/2013 10:13PM
Re: Subquery with range uses filesort  
1,742
David Marcus
12/19/2013 10:28PM
Re: Subquery with range uses filesort  
1,595
Rick James
12/20/2013 07:06PM
Re: Subquery with range uses filesort  
1,697
David Marcus
12/21/2013 07:36AM
Re: Subquery with range uses filesort  
1,741
Rick James
12/22/2013 10:01AM
Re: Subquery with range uses filesort  
1,801
David Marcus
12/22/2013 10:45AM
Re: Subquery with range uses filesort  
1,711
David Marcus
12/25/2013 09:30PM
Optimizer executes inperformant subquery first  
4,104
Martin Kirchner
12/06/2013 07:12AM
Re: Optimizer executes inperformant subquery first  
1,676
Rick James
12/07/2013 02:30PM
Re: Optimizer executes inperformant subquery first  
1,878
Martin Kirchner
12/07/2013 03:49PM
Re: Optimizer executes inperformant subquery first  
1,967
Øystein Grøvlen
12/09/2013 09:48AM
Re: Optimizer executes inperformant subquery first  
1,894
Martin Kirchner
12/18/2013 03:04AM
Re: Optimizer executes inperformant subquery first  
1,646
Øystein Grøvlen
12/19/2013 02:45AM
Re: Optimizer executes inperformant subquery first  
1,611
Martin Kirchner
12/20/2013 02:24AM
Re: Optimizer executes inperformant subquery first  
1,581
Øystein Grøvlen
12/23/2013 08:07AM
Re: Optimizer executes inperformant subquery first  
1,506
Rick James
12/23/2013 01:11PM
Re: Optimizer executes inperformant subquery first  
1,663
Martin Kirchner
12/18/2013 05:16AM
Re: Optimizer executes inperformant subquery first  
1,656
Rick James
12/18/2013 06:49PM
Re: Optimizer executes inperformant subquery first  
1,632
Øystein Grøvlen
12/19/2013 02:49AM
my.cnf  
2,713
Juan Medina
10/27/2013 02:08PM
Re: my.cnf  
1,318
Rick James
10/29/2013 07:12PM
my.cnf optimization please help  
4,335
Ivan Kratunkov
10/28/2013 03:39AM
Re: my.cnf optimization please help  
1,531
Rick James
10/29/2013 07:10PM
MySQL Optimizer: Features in MySQL 5.7  
2,371
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
2,720
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
1,440
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
1,418
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
1,420
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
2,789
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,942
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,696
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,645
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,656
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,528
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,437
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,465
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,805
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
3,300
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,397
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
1,411
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
2,887
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
1,452
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
4,260
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,926
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,646
Rick James
08/31/2013 04:13PM
query index not used  
2,252
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
1,268
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
3,279
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,618
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
1,395
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
1,339
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
1,389
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
1,400
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
1,490
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
1,389
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
2,530
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
1,262
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
4,513
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,865
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,806
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,675
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,753
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,639
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,815
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,999
Rick James
06/04/2013 11:49PM
Query optimization  
3,118
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,501
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,478
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,482
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,603
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,558
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,465
Rick James
05/17/2013 11:47PM
Re: Query optimization  
1,380
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,535
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
2,311
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
3,944
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,469
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
7,275
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
2,245
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
2,168
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,972
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
2,236
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,864
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,941
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
2,446
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,870
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,874
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,933
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,791
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,837
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,778
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,771
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,878
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
2,432
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,835
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
2,048
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,923
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,916
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
3,100
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,738
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,645
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,658
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
2,379
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
9,210
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
3,195
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
2,501
Edwin Desouza
01/22/2013 05:58PM
Can we expect an enhancement for derived table merge optimization?  
4,509
Michael Hogue
01/04/2013 12:04PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,855
Rick James
01/07/2013 10:50PM
Re: Can we expect an enhancement for derived table merge optimization?  
2,349
Roy Lyseng
01/11/2013 09:18AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,594
Rick James
01/13/2013 12:24PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,812
Roy Lyseng
01/14/2013 08:43AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,582
Rick James
01/14/2013 09:54AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,712
Roy Lyseng
01/15/2013 06:15AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,600
Roy Lyseng
01/11/2013 08:51AM
How to best optimize MYSQL Database  
2,787
Muhammad Usman
12/10/2012 03:45AM
Re: How to best optimize MYSQL Database  
1,473
Rick James
12/21/2012 12:49PM
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