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•   Announcing April 2026 Releases featuring MySQL Server 9.7.0, 8.4.9 and 8.0.46 04/27/2026 03:22AM

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Sticky:  MySQL: New JSON format for EXPLAIN (1 Posts)  
481
Edwin Desouza
11/04/2024 10:22AM
Sticky:  MySQL: EXPLAIN INTO and EXPLAIN FOR SCHEMA (1 Posts)  
695
Edwin Desouza
11/24/2023 12:34PM
Sticky:  MySQL 8.0: Hash Join and EXPLAIN ANALYZE (1 Posts)  
1,948
Edwin Desouza
10/01/2019 05:40PM
Sticky:  MySQL 8.0: One Giant Leap For SQL (1 Posts)  
1,691
Edwin Desouza
04/25/2018 10:16AM
Sticky:  Unofficial MySQL 8.0 Optimizer Guide (1 Posts)  
2,061
Edwin Desouza
02/13/2017 04:16PM
Sticky:  MySQL 8.0: Window Functions (1 Posts)  
2,104
Edwin Desouza
02/04/2017 08:57PM
Sticky:  MySQL 8.0: CTEs (1 Posts)  
3,495
Edwin Desouza
10/18/2016 09:38AM
Sticky:  MySQL 8.0: Optimizer & Parser (1 Posts)  
2,719
Edwin Desouza
09/13/2016 10:54AM
Sticky:  MySQL Performance Tuning (1 Posts)  
3,104
Edwin Desouza
07/06/2015 10:37AM
Sticky:  MySQL Parser (1 Posts)  
4,064
Edwin Desouza
04/03/2014 03:31PM
Sticky:  MySQL Optimizer: Features in MySQL 5.7 (1 Posts)  
5,211
Edwin Desouza
12/18/2012 11:38AM
Sticky:  MySQL EXPLAIN (1 Posts)  
5,615
Edwin Desouza
07/10/2012 10:32AM
Sticky:  MySQL Optimizer: Blogs (1 Posts)  
11,544
Edwin DeSouza
04/28/2007 06:20PM
MySQL EXPLAIN ANALYZE  
778
Edwin Desouza
08/09/2023 05:43PM
MySQL Deferred Join: A Deep Dive  
846
Edwin Desouza
08/09/2023 05:28PM
Why multi-valued index is not in possible keys in a dependent subquery  
831
ELON ZHOU
02/02/2023 10:01PM
MySQL Hypergraph Optimizer for HeatWave  
837
Edwin Desouza
01/17/2023 09:20AM
what does explain ref const, const means ?  
1,027
jongse park
11/23/2022 12:00AM
Set Theory in MySQL 8.0: UNION and Now INTERSECT and EXCEPT  
918
Edwin Desouza
11/02/2022 10:25AM
Plugin For Obtaining Tokenized Query  
869
JustADude Tester
10/19/2022 08:23AM
Startup was very slow  
1,623
Charles Rodrigues Rimiru
01/27/2022 07:53AM
Re: Startup was very slow  
633
Peter Brawley
02/28/2022 11:14AM
Re: Startup was very slow  
735
Charles Rodrigues Rimiru
03/02/2022 08:58AM
Re: Startup was very slow  
753
Peter Brawley
03/02/2022 10:58AM
Re: Startup was very slow  
747
Charles Rodrigues Rimiru
03/02/2022 01:57PM
Re: Startup was very slow  
518
Charles Rodrigues
10/09/2022 09:24AM
Why MySQL adding 1 when calculating the records per key?  
741
ffc ddd
09/24/2022 07:16PM
Why MySQL adding 1 when calculating the records per key?  
767
ffc ddd
09/24/2022 07:10PM
MYSQL5.7:OPTIMIZER Contradict Explain  
1,004
yijie fu
09/07/2022 05:02AM
Re: MYSQL5.7:OPTIMIZER Contradict Explain  
581
yijie fu
09/07/2022 05:26AM
Need help with getting rid of filesort  
1,401
Marvin Herbold
06/23/2022 01:53PM
Re: Need help with getting rid of filesort  
588
Peter Brawley
06/24/2022 09:59AM
MySQL 8.0 EXPLAIN ANALYZE  
1,691
Edwin Desouza
02/27/2022 10:37PM
Optimizer in 8.0 in some cases not materializing subquery  
2,553
Benjamin Peikes
01/24/2022 03:37PM
Re: Optimizer in 8.0 in some cases not materializing subquery  
628
Peter Brawley
01/24/2022 04:45PM
Running sql in server is too much slower then laptop  
1,362
Shanxiang MAO
10/25/2021 02:49AM
Re: Running sql in server is too much slower then laptop  
648
Peter Brawley
10/25/2021 09:50AM
Re: Running sql in server is too much slower then laptop  
589
Herems Jing
11/13/2021 07:59PM
Re: Running sql in server is too much slower then laptop  
619
Peter Brawley
11/13/2021 09:21PM
Query optimization on LIKE  
1,215
Sing Lau
10/04/2021 12:08PM
Re: Query optimization on LIKE  
690
Peter Brawley
10/04/2021 01:08PM
Multi-valued index is not in possible keys when there is a subquery  
1,575
Jinlin Yang
07/22/2021 07:18PM
Re: Multi-valued index is not in possible keys when there is a subquery  
655
Peter Brawley
10/04/2021 12:55PM
Run ANALYZE TABLE — Do Not Rely on InnoDB's Automatic Recalculation of Statistics  
1,193
Edwin Desouza
09/08/2021 09:52AM
MySQL: EXPLAINing the Different EXPLAINS  
1,124
Edwin Desouza
08/19/2021 02:57PM
Disable caching in MYSQL for True performance testings?  
2,453
Sing Lau
07/11/2021 02:47PM
Re: Disable caching in MYSQL for True performance testings?  
899
Peter Brawley
07/11/2021 05:21PM
Documentation regarding operator precedence incorrect for LIKE, REGEXP, IN?  
1,445
Justin Ng
06/12/2021 01:29PM
How to optimizate COUNT query with multiple LEFT JOIN  
1,873
Ivan Stoqnov
06/01/2021 01:19AM
Re: How to optimizate COUNT query with multiple LEFT JOIN  
693
Ivan Stoqnov
06/01/2021 01:31AM
Re: How to optimizate COUNT query with multiple LEFT JOIN  
759
Peter Brawley
06/01/2021 12:19PM
Need help with tracing how identifiers are parsed; dot-reserved vs dot-space-reserved  
1,303
Justin Ng
05/25/2021 05:28AM
Re: Need help with tracing how identifiers are parsed; dot-reserved vs dot-space-reserved  
702
Justin Ng
05/25/2021 06:21AM
MySQL Invisible Column  
1,249
Edwin Desouza
01/22/2021 01:48PM
mySQL 8 - view query not using outer predicate  
1,700
Jack Crawford
01/11/2021 10:49AM
Re: mySQL 8 - view query not using outer predicate  
712
Peter Brawley
01/11/2021 12:07PM
Re: mySQL 8 - view query not using outer predicate  
754
Jack Crawford
01/11/2021 12:18PM
Re: mySQL 8 - view query not using outer predicate  
747
Peter Brawley
01/11/2021 01:38PM
Re: mySQL 8 - view query not using outer predicate  
758
Jack Crawford
01/11/2021 02:06PM
Re: mySQL 8 - view query not using outer predicate  
663
Peter Brawley
01/11/2021 03:02PM
Re: mySQL 8 - view query not using outer predicate  
750
Jack Crawford
01/11/2021 04:04PM
Re: mySQL 8 - view query not using outer predicate  
716
Peter Brawley
01/11/2021 10:34PM
MySQL Comparing INTs and CHARs  
1,166
Edwin Desouza
08/24/2020 02:56PM
MySQL 8.0 Indexes, Histograms, and Other Ways to Speed Up Your Queries  
1,225
Edwin Desouza
08/04/2020 07:57PM
MySQL: Using SKIP LOCK For Queue Processing  
1,491
Edwin Desouza
08/03/2020 10:00AM
MySQL 8.0: Modern approaches to replacing accumulation user-defined variable hacks, via Window functions and CTEs  
1,274
Saverio Miroddi
06/16/2020 10:00AM
MySQL 8.0.20: Index-Level Optimizer Hints  
1,294
Edwin Desouza
04/28/2020 09:04AM
Explain features  
1,399
Michael Bialik
03/29/2020 01:29PM
Re: Explain features  
797
Peter Brawley
03/29/2020 02:01PM
MySQL 8.0: using CTEs to generate Sequences/Ranges  
1,216
Edwin Desouza
03/09/2020 01:23PM
MySQL 8.0: A must-know about NOT IN in SQL – more antijoin optimization  
1,419
Edwin Desouza
02/28/2020 11:12AM
msqldump only one row per minute from a 5 row/minute database  
1,442
Adrian C
02/22/2020 12:38PM
Re: msqldump only one row per minute from a 5 row/minute database  
766
Peter Brawley
02/22/2020 01:46PM
MySQL 8.0: EXPLAIN ANALYZE  
1,285
Edwin Desouza
02/14/2020 11:29PM
Explain command type "All" issue  
1,429
Vipin PA
02/14/2020 03:20AM
Re: Explain command type "All" issue  
860
Peter Brawley
02/14/2020 10:28AM
Re: Explain command type "All" issue  
811
Edwin Desouza
02/14/2020 05:52PM
Introduction to MySQL 8.0 CTEs (Part 1+2)  
1,361
Edwin Desouza
02/13/2020 12:02PM
MySQL 8.0: Hash Join  
2,014
Edwin Desouza
02/09/2020 05:09PM
MySQL 8.0: Simple way to figure out why your recursive CTE is running away  
1,286
Edwin Desouza
01/15/2020 06:06AM
optimizer seems to skip stored function call in where clause?  
1,524
John LeSueur
01/08/2020 11:07AM
Re: optimizer seems to skip stored function call in where clause?  
991
John LeSueur
01/08/2020 11:21AM
Re: optimizer seems to skip stored function call in where clause?  
758
John LeSueur
01/08/2020 11:44AM
Re: optimizer seems to skip stored function call in where clause?  
895
Peter Brawley
01/08/2020 01:11PM
MySQL 8.0: AntiJoin  
1,520
Edwin Desouza
12/18/2019 07:54AM
MySQL 8.0: Hash Join  
1,436
Edwin Desouza
11/13/2019 12:36PM
MySQL 8.0: Understanding Hash Joins  
1,225
Edwin Desouza
10/30/2019 11:06AM
Explain Analyze in MySQL 8  
1,253
Edwin Desouza
10/28/2019 05:00PM
optimizing searches using aggregate data in join  
1,620
Matthew Lenz
10/21/2019 09:05AM
Re: optimizing searches using aggregate data in join  
838
Peter Brawley
10/21/2019 11:37AM
MySQL 8.0: EXPLAIN ANALYZE  
1,415
Edwin Desouza
10/17/2019 07:15AM
MySQL 8.0.18 Maintenance Release is Generally Available  
1,744
Edwin Desouza
10/14/2019 01:06PM
Slow Query  
1,876
Deepak Nirmul
06/21/2019 04:47AM
Re: Slow Query  
989
Peter Brawley
06/21/2019 10:17AM
Re: Slow Query  
1,027
Deepak Nirmul
06/24/2019 02:18AM
Re: Slow Query  
881
Peter Brawley
06/24/2019 09:56AM
Re: Slow Query  
867
Deepak Nirmul
06/24/2019 10:15AM
Re: Slow Query  
982
Peter Brawley
06/24/2019 10:45AM
Re: Slow Query  
974
Gopal venkat
09/04/2019 11:47AM
Gopal, please don't hijack threads  
924
Peter Brawley
09/04/2019 02:32PM
Re: Slow Query  
825
marimuthu B
09/06/2019 05:59AM
Re: Slow Query  
902
Peter Brawley
09/06/2019 09:57AM
MySQL 8.0: Supporting all kinds of outer references in derived tables (lateral, or not)  
1,426
Edwin Desouza
07/12/2019 11:13AM
setting an index for speed  
1,506
Michael Peters
07/02/2019 04:56AM
Re: setting an index for speed  
863
Peter Brawley
07/02/2019 12:29PM
This topic has been moved.:  optimizing searches using aggregate data in join  
0
Matthew Lenz
10/21/2019 11:06AM
This topic has been moved.:  setting an index for speed  
9
Michael Peters
07/02/2019 12:26PM
This topic has been moved.:  Slow Query  
0
Deepak Nirmul
06/21/2019 10:18AM
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