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Subject Views Written By Posted
Sticky:  MySQL 8.0: Optimizer & Parser (1 Posts)   61 Edwin Desouza 09/13/2016 10:54AM
Sticky:  MySQL Performance Tuning (1 Posts)   866 Edwin Desouza 07/06/2015 10:37AM
Sticky:  MySQL Parser (1 Posts)   1,567 Edwin Desouza 04/03/2014 03:31PM
Sticky:  MySQL Optimizer: Features in MySQL 5.7 (1 Posts)   2,940 Edwin Desouza 12/18/2012 11:38AM
Sticky:  MySQL EXPLAIN (1 Posts)   3,521 Edwin Desouza 07/10/2012 10:32AM
Sticky:  MySQL Optimizer: Blogs (1 Posts)   9,002 Edwin DeSouza 04/28/2007 06:20PM
inner join vs left join - huge performance difference   10 michael cook 07/06/2016 09:32AM
Re: inner join vs left join - huge performance difference   2 Peter Brawley 07/06/2016 12:00PM
Re: inner join vs left join - huge performance difference   2 michael cook 07/06/2016 12:18PM
Re: inner join vs left join - huge performance difference   2 michael cook 07/06/2016 12:29PM
Re: inner join vs left join - huge performance difference   2 Peter Brawley 07/06/2016 12:36PM
Re: inner join vs left join - huge performance difference   3 michael cook 07/06/2016 12:44PM
Re: inner join vs left join - huge performance difference   2 michael cook 07/06/2016 01:51PM
Re: inner join vs left join - huge performance difference   2 Peter Brawley 07/06/2016 02:32PM
Re: inner join vs left join - huge performance difference   2 michael cook 07/06/2016 02:41PM
Re: inner join vs left join - huge performance difference   2 Rick James 07/08/2016 11:58PM
Re: inner join vs left join - huge performance difference   2 Peter Brawley 07/09/2016 09:54AM
Re: inner join vs left join - huge performance difference   5 Isabella Swan 09/27/2016 07:13AM
This topic has been moved.:  INSERT AfTER LEFT JOIN creates duplicate records   10 Brad Liu 09/20/2016 02:09PM
MySQL 8.0: Invisible Indexes   35 Edwin Desouza 09/20/2016 09:21AM
Preparse Query Rewrite Plugin DLL   158 Francois Haddad 08/12/2016 05:16PM
Re: Preparse Query Rewrite Plugin DLL   38 Georgi Kodinov 09/08/2016 02:23AM
Re: Preparse Query Rewrite Plugin DLL   26 Francois Haddad 09/14/2016 07:04PM
Re: Preparse Query Rewrite Plugin DLL   27 Tor Didriksen 09/15/2016 01:40AM
Re: Preparse Query Rewrite Plugin DLL   26 Francois Haddad 09/15/2016 11:34AM
why the two query has a different execute plan?   91 h h 08/22/2016 02:55AM
Re: why the two query has a different execute plan?   47 Øystein Grøvlen 08/22/2016 05:08AM
Re: why the two query has a different execute plan?   43 Rick James 08/26/2016 02:29PM
This topic has been moved.:  Preparse Query Rewrite Plugin DLL   21 Francois Haddad 08/15/2016 09:28AM
how to optimize this sql?   133 h h 07/07/2016 07:38PM
Re: how to optimize this sql?   70 Peter Brawley 07/08/2016 10:59AM
Re: how to optimize this sql?   58 h h 07/12/2016 09:01PM
Re: how to optimize this sql?   63 Rick James 07/09/2016 11:04PM
Re: how to optimize this sql?   60 h h 07/12/2016 09:08PM
Re: how to optimize this sql?   56 Rick James 07/14/2016 12:52PM
Indexing for date column for range query   150 duc minh 07/05/2016 11:04PM
Re: Indexing for date column for range query   64 Rick James 07/09/2016 10:47PM
Help with partially unique index   181 El T 06/22/2016 04:44AM
Re: Help with partially unique index   81 Rick James 06/25/2016 10:45PM
Re: Help with partially unique index   70 El T 07/02/2016 03:33PM
Re: Help with partially unique index   73 Rick James 07/04/2016 12:50PM
Explain plans for InnoDB and Memory Engines   262 Jagan Kumar 05/02/2016 03:15PM
Re: Explain plans for InnoDB and Memory Engines   120 Peter Brawley 05/02/2016 09:23PM
Re: Explain plans for InnoDB and Memory Engines   117 Øystein Grøvlen 05/04/2016 05:17AM
Re: Explain plans for InnoDB and Memory Engines   120 Rick James 05/05/2016 10:18PM
MySQL Query Rewrite Plugins   383 Edwin Desouza 02/02/2016 09:48PM
why left join can not use unique index?   677 h h 12/07/2015 08:30PM
Re: why left join can not use unique index?   257 Rick James 12/08/2015 08:46PM
Re: why left join can not use unique index?   238 h h 12/11/2015 03:20AM
Re: why left join can not use unique index?   246 Rick James 12/15/2015 11:08AM
This topic has been moved.:  A stored function to remove diacritics and other chars   20 Marc Elbet 12/11/2015 03:50AM
prepared statement query takes 3s for a few hundred lines - query issue   535 Michael W. 11/16/2015 11:14AM
Re: prepared statement query takes 3s for a few hundred lines - query issue   220 Rick James 11/30/2015 08:09PM
Re: prepared statement query takes 3s for a few hundred lines - query issue   268 Michael W. 12/01/2015 07:10AM
Re: prepared statement query takes 3s for a few hundred lines - query issue   229 Rick James 12/07/2015 01:17AM
Why not use index   589 zhang peng 11/08/2015 11:14PM
Re: Why not use index   246 Peter Brawley 11/09/2015 11:42AM
Re: Why not use index   242 zhang peng 11/11/2015 12:17AM
Re: Why not use index   241 Øystein Grøvlen 11/10/2015 10:35AM
Re: Why not use index   266 zhang peng 11/11/2015 12:15AM
Re: Why not use index   236 Øystein Grøvlen 11/11/2015 03:40AM
Re: Why not use index   243 zhang peng 11/11/2015 07:29PM
Re: Why not use index   268 Peter Brawley 11/11/2015 11:00PM
Re: Why not use index   215 Øystein Grøvlen 11/12/2015 01:48AM
Re: Why not use index   239 zhang peng 11/16/2015 12:17AM
Google Update Optimizer system   528 Anik Bhowmik 11/09/2015 09:35PM
Re: Google Update Optimizer system   255 Peter Brawley 11/09/2015 10:12PM
Re: Google Update Optimizer system   237 Jonathan Stephens 11/10/2015 01:02AM
Normalize dump table   777 Jose Valle 10/11/2015 08:37PM
Re: Normalize dump table   237 Jose Valle 10/11/2015 08:42PM
Re: Normalize dump table   250 Antonio Valle 10/13/2015 01:41PM
Re: Normalize dump table   264 Rick James 10/17/2015 07:15PM
optimize query for index using between and group by   779 Raghavendra raghu 08/28/2015 03:21AM
Re: optimize query for index using between and group by   406 Rick James 08/29/2015 09:56AM
Re: optimize query for index using between and group by   325 Raghavendra raghu 08/31/2015 02:34AM
Parsing in MySQL Workbench: the ANTLR age   666 Edwin Desouza 08/14/2015 10:16AM
MySQL Optimizer: Hints   839 Edwin Desouza 07/29/2015 10:07AM
Index not working for date field used in between query   1,092 Shrinivasa rao 07/22/2015 11:48PM
Re: Index not working for date field used in between query   463 Rick James 07/26/2015 08:28AM
MyISAM using 'wrong' index   820 Danny Stommen 06/08/2015 04:14AM
Re: MyISAM using 'wrong' index   404 Rick James 06/09/2015 11:53PM
Re: MyISAM using 'wrong' index   409 Danny Stommen 06/30/2015 03:22AM
Re: MyISAM using 'wrong' index   374 Rick James 07/02/2015 09:28PM
Re: MyISAM using 'wrong' index   403 Danny Stommen 07/03/2015 03:16AM
Re: MyISAM using 'wrong' index   448 Rick James 07/04/2015 11:10AM
Re: MyISAM using 'wrong' index   393 Danny Stommen 07/07/2015 01:56AM
Re: MyISAM using 'wrong' index   377 Edwin Desouza 07/07/2015 09:10AM
Need help understanding optimizer behavior in 5.6   940 Aaron Craven 06/22/2015 08:30AM
Re: Need help understanding optimizer behavior in 5.6   422 Aaron Craven 06/22/2015 08:31AM
Re: Need help understanding optimizer behavior in 5.6   374 Rick James 06/23/2015 07:00PM
Re: Need help understanding optimizer behavior in 5.6   359 Aaron Craven 06/24/2015 06:22AM
Re: Need help understanding optimizer behavior in 5.6   371 Rick James 06/25/2015 11:37PM
Re: Need help understanding optimizer behavior in 5.6   390 Aaron Craven 06/26/2015 06:56AM
Re: Need help understanding optimizer behavior in 5.6   371 Øystein Grøvlen 06/30/2015 05:46AM
Re: Need help understanding optimizer behavior in 5.6   514 Aaron Craven 06/30/2015 08:06AM
Re: Need help understanding optimizer behavior in 5.6   370 Aaron Craven 06/30/2015 08:16AM
Re: Need help understanding optimizer behavior in 5.6   362 Øystein Grøvlen 07/01/2015 03:49AM
Re: Need help understanding optimizer behavior in 5.6   372 Aaron Craven 07/01/2015 06:48AM
Re: Need help understanding optimizer behavior in 5.6   416 Edwin Desouza 07/01/2015 03:05PM
Re: Need help understanding optimizer behavior in 5.6   377 Aaron Craven 07/02/2015 07:48AM
MySQL 5.7: Optimizer Trace and EXPLAIN FORMAT=JSON   940 Edwin Desouza 05/25/2015 10:41AM
foreign key creation in a huge database   931 Raffael Vendrametto 03/05/2015 04:05PM
Please do NOT duplicate posts   481 Peter Brawley 03/05/2015 05:42PM
Query Taking 2.5hrs on 5.6.20 version   1,146 ch srinivas 03/04/2015 01:30AM
Re: Query Taking 2.5hrs on 5.6.20 version   534 Peter Brawley 03/04/2015 12:15PM
Re: Query Taking 2.5hrs on 5.6.20 version   483 Rick James 03/04/2015 08:18PM
Query optimisation advice   1,222 Paul Feely 01/08/2015 11:02PM
Re: Query optimisation advice   622 Rick James 01/10/2015 01:22AM
Re: Query optimisation advice   589 Paul Feely 01/11/2015 05:50PM
Re: Query optimisation advice   563 Rick James 01/12/2015 10:35PM
actual Size calculation of mysql table (engine innodb)   1,100 Afaque Ahmad Siddiqui 12/10/2014 09:38AM
Re: actual Size calculation of mysql table (engine innodb)   571 Rick James 12/12/2014 08:32PM
Re: actual Size calculation of mysql table (engine innodb)   559 Rick James 12/12/2014 08:36PM
MySQL cash optimization   1,288 Sasha Katsman 11/27/2014 06:33AM
Re: MySQL cash optimization   676 Peter Brawley 11/27/2014 04:34PM
Re: MySQL cash optimization   525 Sasha Katsman 12/09/2014 04:33AM
Re: MySQL cache optimization   497 Peter Brawley 12/09/2014 12:28PM
how to tune for optimizer_search_depth?   1,174 jongse park 12/03/2014 12:13AM
Re: how to tune for optimizer_search_depth?   639 Rick James 12/03/2014 11:33PM
Re: how to tune for optimizer_search_depth?   683 Øystein Grøvlen 12/08/2014 05:32AM
MySQL Optimizer Cost Model   1,205 Edwin Desouza 10/24/2014 10:37AM
Need help to create index on join statments   1,246 Neil Sorathia 10/08/2014 06:24PM
Re: Need help to create index on join statments   595 Neil Sorathia 10/09/2014 09:46AM
Re: Need help to create index on join statments   615 Rick James 10/11/2014 01:37PM
Better Performance for JOINs Not Using Indexes   1,175 Edwin Desouza 10/03/2014 01:48PM
A Multi-Table Trick to Speed up Single-Table UPDATE/DELETE Statements   1,283 Edwin Desouza 10/03/2014 01:47PM
MySQL 5.7: Optimizer Hints + Query Rewrite   1,224 Edwin Desouza 10/01/2014 08:53AM
Intermediate Query Results   1,445 Ashwini Singh 09/12/2014 08:37AM
Re: Intermediate Query Results   675 Rick James 09/13/2014 09:23PM
Re: Intermediate Query Results   789 Øystein Grøvlen 09/15/2014 05:42AM
All records scanning using "LIKe" and "IN" operaters   1,384 ch srinivas 06/28/2014 01:43PM
Re: All records scanning using "LIKe" and "IN" operaters   662 Peter Brawley 06/28/2014 02:22PM
Re: All records scanning using "LIKe" and "IN" operaters   632 Øystein Grøvlen 08/28/2014 03:47PM
Help me to optimize my sql query   1,230 GAURAV JAIN 08/21/2014 07:29AM
Re: Help me to optimize my sql query   620 Rick James 08/22/2014 06:50AM
How could this SQL be optimized?   1,478 feng guo 05/29/2014 11:26PM
Re: How could this SQL be optimized?   728 Øystein Grøvlen 05/30/2014 02:41AM
Re: How could this SQL be optimized?   800 feng guo 05/30/2014 02:46AM
Re: How could this SQL be optimized?   615 Marion Gordon 08/21/2014 11:03PM
Re: How could this SQL be optimized?   598 Øystein Grøvlen 08/22/2014 01:54AM
simple uses of order by datetime keep causing 'using filesort'   1,405 park albert 08/19/2014 05:44PM
Re: simple uses of order by datetime keep causing 'using filesort'   669 Rick James 08/20/2014 07:34PM
Expland and slow-query don't agree   1,292 Aram Mirzadeh 08/03/2014 06:24AM
Re: Expland and slow-query don't agree   633 Rick James 08/04/2014 01:23PM
Query not using index sporadically   1,494 Vinay NP 06/13/2014 07:51AM
Re: Query not using index sporadically   754 Rick James 06/18/2014 02:48PM
[HELP] Subquery Optimization   1,531 Pinoy Central 05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements   1,252 Edwin Desouza 05/15/2014 12:29PM
BETWEEN a DATE and a hard place   1,517 Gerald Bayles 04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place   749 Rick James 04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place   797 Gerald Bayles 04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place   812 Rick James 04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place   825 Gerald Bayles 04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place   734 Rick James 04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place   764 Gerald Bayles 04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place   791 Gerald Bayles 05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place   864 Rick James 05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7   1,303 Edwin Desouza 04/22/2014 10:03AM
Access mysql blob data from stored procedure   1,832 Kalpesh g 04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure   797 Peter Brawley 04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory   1,930 Andre Mikulec 03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory   946 Rick James 03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory   898 Rick James 03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day   2,141 Blake Harps 02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day   878 Øystein Grøvlen 02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day   976 Mattias Jonsson 02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day   895 Blake Harps 02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day   904 Blake Harps 02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day   901 Edwin Desouza 02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day   925 Rick James 02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day   900 Blake Harps 03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day   962 Mattias Jonsson 02/17/2014 04:29PM
Subquery with range uses filesort   2,448 David Marcus 11/16/2013 02:42PM
Re: Subquery with range uses filesort   1,041 Rick James 11/17/2013 07:42PM
Re: Subquery with range uses filesort   963 David Marcus 11/17/2013 08:01PM
Re: Subquery with range uses filesort   992 Rick James 11/18/2013 04:33PM
Re: Subquery with range uses filesort   1,274 David Marcus 11/18/2013 07:54PM
Re: Subquery with range uses filesort   1,045 Rick James 11/19/2013 04:10PM
Re: Subquery with range uses filesort   1,084 David Marcus 11/19/2013 08:36PM
Re: Subquery with range uses filesort   1,067 Rick James 11/21/2013 02:55PM
Re: Subquery with range uses filesort   1,228 David Marcus 12/05/2013 03:46PM
Re: Subquery with range uses filesort   955 Rick James 12/07/2013 02:10PM
Re: Subquery with range uses filesort   985 David Marcus 12/09/2013 06:08PM
Re: Subquery with range uses filesort   996 David Marcus 12/14/2013 09:51PM
Re: Subquery with range uses filesort   969 David Marcus 12/14/2013 10:17PM
Re: Subquery with range uses filesort   997 Rick James 12/15/2013 11:29PM
Re: Subquery with range uses filesort   1,060 David Marcus 12/17/2013 06:58PM
Re: Subquery with range uses filesort   977 Rick James 12/18/2013 05:49PM
Re: Subquery with range uses filesort   985 David Marcus 12/18/2013 08:28PM
Re: Subquery with range uses filesort   1,070 Rick James 12/19/2013 10:13PM
Re: Subquery with range uses filesort   1,009 David Marcus 12/19/2013 10:28PM
Re: Subquery with range uses filesort   930 Rick James 12/20/2013 07:06PM
Re: Subquery with range uses filesort   1,004 David Marcus 12/21/2013 07:36AM
Re: Subquery with range uses filesort   1,030 Rick James 12/22/2013 10:01AM
Re: Subquery with range uses filesort   1,083 David Marcus 12/22/2013 10:45AM
Re: Subquery with range uses filesort   956 David Marcus 12/25/2013 09:30PM
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