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Order By Slows down Joins  
3,451
Sami BH
08/22/2012 09:12AM
Re: Order By Slows down Joins  
1,060
Rick James
08/23/2012 08:56PM
always uses filesort even after adding indexes  
2,445
Pranav Gore
08/22/2012 02:49AM
Re: always uses filesort even after adding indexes  
1,156
Rick James
08/22/2012 10:52PM
STRAIGHT_JOIN for OUTER JOINGS  
3,501
Paul Tsui
08/19/2012 08:28PM
Re: STRAIGHT_JOIN for OUTER JOINGS  
1,640
Øystein Grøvlen
08/20/2012 05:16AM
CPU usage 99% - and query very slow - help  
4,582
irox ferenc
08/03/2012 10:49AM
Re: CPU usage 99% - and query very slow - help  
1,865
Rick James
08/04/2012 01:36PM
Re: CPU usage 99% - and query very slow - help  
2,553
robert eeeeee
08/06/2012 01:04PM
Re: CPU usage 99% - and query very slow - help  
1,919
Øystein Grøvlen
08/15/2012 03:09AM
Execution plan: wrong index selected, very poor performance.  
4,141
Andrej Andrejevic
07/18/2012 10:31AM
Re: Execution plan: wrong index selected, very poor performance.  
1,666
Rick James
07/19/2012 10:07PM
Re: Execution plan: wrong index selected, very poor performance.  
1,473
Andrej Andrejevic
07/20/2012 01:38AM
Re: Execution plan: wrong index selected, very poor performance.  
1,272
Andrej Andrejevic
07/24/2012 04:27AM
Re: Execution plan: wrong index selected, very poor performance.  
1,298
Rick James
07/25/2012 12:21AM
Index for Query  
2,567
dileep ch
07/17/2012 12:41AM
Re: Index for Query  
1,298
Rick James
07/17/2012 10:36PM
Re: Index for Query  
1,308
dileep ch
07/18/2012 11:52PM
Re: Index for Query  
1,971
Rick James
07/19/2012 09:49PM
best way to optimize this query  
2,637
Jap bn
07/14/2012 09:54AM
Re: best way to optimize this query  
1,534
Rick James
07/15/2012 10:11PM
Optimizer being overly aggressive  
2,525
Adrian Cornish
07/06/2012 08:18PM
Re: Optimizer being overly aggressive  
1,294
Rick James
07/10/2012 12:49PM
Re: Optimizer being overly aggressive  
1,274
Adrian Cornish
07/10/2012 08:54PM
multiple-column index and order by  
2,798
Raphael Hoffmann
07/06/2012 05:59PM
Re: multiple-column index and order by  
1,331
Rick James
07/10/2012 12:55PM
From Months to Seconds with Subquery Materialization  
1,965
Edwin DeSouza
07/09/2012 11:15AM
performing mysqldump corrected query issue?  
2,319
Peter Sylvester
06/26/2012 01:12PM
Re: performing mysqldump corrected query issue?  
1,298
Rick James
07/01/2012 06:43PM
Re: performing mysqldump corrected query issue?  
1,095
Peter Sylvester
06/26/2012 02:08PM
difference between READ and SCAN  
2,039
Linhai Song
06/20/2012 04:05PM
Re: difference between READ and SCAN  
1,059
Rick James
06/20/2012 08:23PM
Re: difference between READ and SCAN  
1,377
Linhai Song
06/21/2012 12:19PM
to optimize a self join request  
1,939
Oracleuser user
06/14/2012 08:23AM
Re: to optimize a self join request  
1,314
Rick James
06/15/2012 08:19AM
Call out for FULL JOIN - bug #18003  
2,098
ted strauss
06/14/2012 10:23AM
Re: Call out for FULL JOIN - bug #18003  
968
ted strauss
06/14/2012 12:13PM
index cannot be used when passing 'int' to 'varchar'  
2,724
liao zhifeng
06/10/2012 11:16PM
Re: index cannot be used when passing 'int' to 'varchar'  
1,138
Rick James
06/11/2012 11:27PM
Re: index cannot be used when passing 'int' to 'varchar'  
1,176
liao zhifeng
06/12/2012 12:48AM
Re: index cannot be used when passing 'int' to 'varchar'  
1,205
Rick James
06/12/2012 09:23PM
Re: index cannot be used when passing 'int' to 'varchar'  
1,380
liao zhifeng
06/12/2012 11:16PM
Re: index cannot be used when passing 'int' to 'varchar'  
1,160
Rick James
06/13/2012 07:15PM
Re: index cannot be used when passing 'int' to 'varchar'  
1,122
liao zhifeng
06/13/2012 10:35PM
Table does not support optimize...  
3,173
Piotr Ch
06/02/2012 12:58AM
Querying a fast subquery never returns  
1,972
Eric Coll
05/22/2012 05:15PM
Re: Querying a fast subquery never returns  
1,110
Eric Coll
05/22/2012 05:19PM
Re: Querying a fast subquery never returns  
1,371
Rick James
05/24/2012 12:40AM
Re: Querying a fast subquery never returns  
1,340
Eric Coll
05/25/2012 11:15AM
Re: Querying a fast subquery never returns  
1,184
Rick James
05/26/2012 10:59AM
table index optimization  
2,261
Matus Zeman
05/01/2012 10:55AM
Re: table index optimization  
1,098
Rick James
05/02/2012 07:08PM
Re: table index optimization  
1,282
Rick James
05/05/2012 09:07AM
Re: table index optimization  
1,122
Matus Zeman
05/17/2012 09:25AM
Re: table index optimization  
1,399
Matus Zeman
05/04/2012 08:20AM
Query execution plan  
2,764
Chris Slominski
05/08/2012 12:38PM
Re: Query execution plan  
1,206
Rick James
05/09/2012 09:35PM
Re: Query execution plan  
1,335
Chris Slominski
05/10/2012 08:29AM
Re: Query execution plan  
1,299
Rick James
05/11/2012 07:16PM
Re: Query execution plan  
1,370
Chris Slominski
05/14/2012 05:27AM
Re: Query execution plan  
1,118
Rick James
05/15/2012 07:22PM
Re: Query execution plan  
1,137
Chris Slominski
05/09/2012 11:08AM
limit & scala subquery  
2,142
jongse park
05/08/2012 10:33PM
Re: limit & scala subquery  
1,031
Rick James
05/09/2012 09:21PM
Mysql slow upadte  
1,657
krishna krishna
04/30/2012 06:09AM
1000 Columns, 1000 Tables, or what?  
2,753
Fernando Oliveira
04/19/2012 08:09AM
Re: 1000 Columns, 1000 Tables, or what?  
1,351
Rick James
04/20/2012 06:50PM
Re: 1000 Columns, 1000 Tables, or what?  
1,129
Fernando Oliveira
04/23/2012 08:10AM
Re: 1000 Columns, 1000 Tables, or what?  
1,384
Rick James
04/26/2012 07:59AM
Help with query/tables optimization  
2,048
Oleg Ivanov
04/14/2012 05:20AM
Re: Help with query/tables optimization  
1,235
Rick James
04/16/2012 12:05AM
Re: Help with query/tables optimization  
1,303
Oleg Ivanov
04/16/2012 11:53AM
Re: Help with query/tables optimization  
1,622
Oleg Ivanov
04/16/2012 12:04PM
Identical servers different plan for the same query  
2,896
Eric Coll
04/07/2012 01:20AM
Re: Identical servers different plan for the same query  
1,254
Eric Coll
04/10/2012 03:28PM
Re: Identical servers different plan for the same query  
1,285
Rick James
04/10/2012 10:29PM
Re: Identical servers different plan for the same query  
1,189
Eric Coll
04/11/2012 10:05AM
Re: Identical servers different plan for the same query  
1,305
Rick James
04/12/2012 08:56AM
Re: Identical servers different plan for the same query  
1,203
Eric Coll
04/12/2012 03:23PM
Re: Identical servers different plan for the same query  
2,399
Rick James
04/13/2012 03:49PM
Re: Identical servers different plan for the same query  
1,271
Eric Coll
04/07/2012 09:55AM
Re: Identical servers different plan for the same query  
1,268
irek kordirko
04/07/2012 02:54PM
Re: Identical servers different plan for the same query  
1,508
Rick James
04/08/2012 12:20PM
Re: Identical servers different plan for the same query  
1,620
Eric Coll
04/09/2012 10:24AM
Re: Identical servers different plan for the same query  
1,264
Eric Coll
04/09/2012 10:35AM
Re: Identical servers different plan for the same query  
1,233
Eric Coll
04/09/2012 10:37AM
Re: Identical servers different plan for the same query  
1,287
Eric Coll
04/09/2012 10:42AM
MySQL Optimizer: Improved DBT-3 Results with MySQL 5.6.5  
1,687
Edwin DeSouza
04/10/2012 05:31PM
MySQL Optimizer: Improvements for many-table joins  
1,687
Edwin DeSouza
04/10/2012 02:54PM
MySQL Optimizer Team Blog  
2,000
Edwin DeSouza
04/10/2012 01:58PM
MySQL Optimizer: Index Condition Pushdown to the rescue!  
1,783
Edwin DeSouza
04/10/2012 01:56PM
MySQL Optimizer: Semi-join in MySQL 5.6  
1,403
Edwin DeSouza
04/10/2012 01:56PM
MySQL Optimizer: On queries with many values in the IN clause  
1,644
Edwin DeSouza
04/10/2012 01:55PM
MySQL Optimizer: Faster subqueries with materialization  
1,459
Edwin DeSouza
04/10/2012 01:54PM
MySQL Optimizer: Structured EXPLAIN (JSON)  
1,884
Edwin DeSouza
04/10/2012 01:54PM
LEFT JOIN WHERE GROUP BY  
2,665
Daniel Flöijer
04/02/2012 02:51AM
Re: LEFT JOIN WHERE GROUP BY  
1,392
Rick James
04/05/2012 08:01PM
Re: LEFT JOIN WHERE GROUP BY  
1,123
irek kordirko
04/02/2012 12:04PM
Re: LEFT JOIN WHERE GROUP BY  
1,172
Daniel Flöijer
04/02/2012 01:24PM
Re: LEFT JOIN WHERE GROUP BY  
1,199
irek kordirko
04/02/2012 04:29PM
Re: LEFT JOIN WHERE GROUP BY  
1,833
Daniel Flöijer
04/03/2012 12:50AM
Re: LEFT JOIN WHERE GROUP BY  
1,188
irek kordirko
04/03/2012 05:40PM
Re: LEFT JOIN WHERE GROUP BY  
1,300
Daniel Flöijer
04/03/2012 11:22PM
Re: LEFT JOIN WHERE GROUP BY  
1,135
irek kordirko
04/04/2012 05:12PM
Re: LEFT JOIN WHERE GROUP BY  
920
Daniel Flöijer
04/04/2012 11:10PM
Explain the order of query  
2,118
jongse park
03/19/2012 01:49AM
Re: Explain the order of query  
1,132
Rick James
03/19/2012 10:38PM
Re: Explain the order of query  
1,131
jongse park
03/21/2012 07:06PM
Re: Explain the order of query  
1,430
Jørgen Løland
03/28/2012 05:06AM
Re: Explain the order of query  
905
Rick James
03/22/2012 06:01PM
Re: Explain the order of query  
928
jongse park
03/22/2012 08:13PM
Re: Explain the order of query  
928
Rick James
03/23/2012 07:57PM
Queries using JOIN and ORDER BY LIMIT  
17,924
Nikita Dubrovsky
03/10/2012 01:11PM
Re: Queries using JOIN and ORDER BY LIMIT  
2,503
irek kordirko
03/12/2012 06:18PM
Re: Queries using JOIN and ORDER BY LIMIT  
2,375
Rick James
03/13/2012 11:07PM
Re: Queries using JOIN and ORDER BY LIMIT  
1,856
Nikita Dubrovsky
03/14/2012 08:45AM
Re: Queries using JOIN and ORDER BY LIMIT  
2,221
Rick James
03/15/2012 10:50AM
Obfuscate Functions and Procedures  
1,974
Tremal Naik
03/12/2012 05:00AM
Re: Obfuscate Functions and Procedures  
1,382
Rick James
03/13/2012 10:46PM
Group by not using index  
2,241
Matthew Moles
03/02/2012 10:06AM
Re: Group by not using index  
1,139
Rick James
03/04/2012 10:59PM
Re: Group by not using index  
1,079
Matthew Moles
03/05/2012 03:57AM
Re: Group by not using index  
996
irek kordirko
03/03/2012 05:22PM
Optimizing query  
1,917
Marko Kupusic
02/24/2012 06:07AM
Re: Optimizing query  
1,043
Rick James
02/25/2012 05:54PM
Re: Optimizing query  
960
Marko Kupusic
02/27/2012 06:04AM
Re: Optimizing query  
1,035
Rick James
02/28/2012 07:57PM
Re: Optimizing query  
971
Ole John Aske
02/25/2012 03:49AM
Re: Optimizing query  
1,272
Marko Kupusic
02/27/2012 05:57AM
Re: Optimizing query  
1,080
Scott Nemes
02/24/2012 01:16PM
how to optimise query for 10+ millions records  
2,570
Azhar Rahi
02/09/2012 03:30AM
Re: how to optimise query for 10+ millions records  
1,557
irek kordirko
02/09/2012 05:31AM
Re: how to optimise query for 10+ millions records  
1,225
Azhar Rahi
02/09/2012 05:38AM
Re: how to optimise query for 10+ millions records  
1,110
irek kordirko
02/09/2012 05:58PM
Re: how to optimise query for 10+ millions records  
1,113
Rick James
02/11/2012 11:26PM
Re: how to optimise query for 10+ millions records  
1,332
Azhar Rahi
02/12/2012 10:12PM
Re: how to optimise query for 10+ millions records  
1,210
irek kordirko
02/13/2012 02:18PM
Re: how to optimise query for 10+ millions records  
1,379
Azhar Rahi
02/14/2012 02:33AM
Re: how to optimise query for 10+ millions records  
1,134
irek kordirko
02/14/2012 07:24AM
Re: how to optimise query for 10+ millions records  
1,244
Rick James
02/15/2012 07:30AM
Re: how to optimise query for 10+ millions records  
1,648
Azhar Rahi
02/16/2012 03:54AM
Re: how to optimise query for 10+ millions records  
1,144
Rick James
02/17/2012 01:20AM
Re: how to optimise query for 10+ millions records  
973
Azhar Rahi
02/17/2012 03:57PM
Re: how to optimise query for 10+ millions records  
1,342
irek kordirko
02/17/2012 05:12PM
Re: how to optimise query for 10+ millions records  
1,140
Azhar Rahi
02/20/2012 02:21AM
Re: how to optimise query for 10+ millions records  
1,170
Rick James
02/18/2012 07:18AM
Re: how to optimise query for 10+ millions records  
1,191
Azhar Rahi
02/21/2012 03:25AM
Re: how to optimise query for 10+ millions records  
1,222
Rick James
02/24/2012 10:45AM
Join  
1,978
johne doe
02/01/2012 06:51AM
Re: Join Query Performance Problme  
1,046
Rick James
02/03/2012 10:18AM
Re: Join Query Performance Problme  
1,039
irek kordirko
02/01/2012 11:14AM
Re: Join Query Performance Problme  
1,074
johne doe
02/02/2012 12:39AM
Re: Join Query Performance Problme  
1,029
johne doe
02/02/2012 06:47AM
Re: Join Query Performance Problme  
1,041
irek kordirko
02/02/2012 07:02PM
Re: Join Query Performance Problme  
1,024
johne doe
02/03/2012 12:29AM
Re: Join Query Performance Problme  
1,266
irek kordirko
02/03/2012 11:27AM
Re: Join Query Performance Problme  
1,038
Rick James
02/04/2012 10:39AM
Re: Join Query Performance Problme  
1,190
johne doe
02/14/2012 06:08PM
Re: Join Query Performance Problme  
1,045
johne doe
02/06/2012 06:13AM
query cost calculations  
3,703
Silpa Majeti
02/11/2012 04:01AM
Re: query cost calculations  
1,317
Øystein Grøvlen
02/13/2012 07:13PM
Re: query cost calculations  
1,466
Rick James
02/12/2012 01:03PM
Strange performance results with JOIN/COUNT  
2,127
Tomas Pluskal
02/08/2012 06:25PM
Re: Strange performance results with JOIN/COUNT  
1,004
Øystein Grøvlen
02/09/2012 03:01AM
Re: Strange performance results with JOIN/COUNT  
1,386
Tomas Pluskal
02/09/2012 03:13AM
Re: Strange performance results with JOIN/COUNT  
1,274
irek kordirko
02/11/2012 02:53AM
Re: Strange performance results with JOIN/COUNT  
976
Tomas Pluskal
02/12/2012 06:44PM
Strange performance with JOIN/COUNT  
2,365
Tomas Pluskal
02/09/2012 12:30AM
Re: Strange performance with JOIN/COUNT  
1,030
Rick James
02/11/2012 11:11PM
Why MySQL does not use an index?  
2,607
Panayotis Matsinopoulos
01/16/2012 02:50AM
Re: Why MySQL does not use an index?  
1,185
Rick James
01/19/2012 12:25AM
Re: Why MySQL does not use an index?  
1,262
Panayotis Matsinopoulos
02/10/2012 01:21AM
Re: Why MySQL does not use an index?  
1,184
Rick James
02/11/2012 10:48PM
Re: Why MySQL does not use an index?  
1,077
irek kordirko
02/10/2012 09:50AM
MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
2,688
Chris Ricks
02/02/2012 01:17AM
Re: MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
1,103
Chris Ricks
02/01/2012 07:33PM
Re: MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
1,035
Øystein Grøvlen
02/02/2012 03:58AM
Re: MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
1,071
Chris Ricks
02/02/2012 04:43AM
Re: MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
1,034
Rick James
02/03/2012 11:57PM
Re: MySQL 5.5 Query Optimizer - Massive Regression (vs 5.0)  
1,142
Chris Ricks
02/02/2012 03:06AM
running running running  
1,994
paolo tome
01/30/2012 03:16AM
Re: running running running  
1,077
Øystein Grøvlen
01/30/2012 02:39AM
Re: running running running  
915
paolo tome
01/30/2012 09:13AM
Re: running running running  
860
paolo tome
01/31/2012 05:44AM
Re: running running running  
1,008
Øystein Grøvlen
01/31/2012 07:54AM
Re: running running running  
1,094
paolo tome
01/31/2012 03:10AM
Re: running running running  
1,053
Ole John Aske
01/31/2012 05:00PM
How to avoid filesort in ORDER BY?  
3,986
Andy S
01/26/2012 10:58PM
Re: How to avoid filesort in ORDER BY?  
1,772
irek kordirko
01/27/2012 08:20AM
avoid filesort  
1,716
Magnus Larsson
01/22/2012 01:08PM
Re: avoid filesort  
1,092
Rick James
01/24/2012 01:17AM
Re: avoid filesort  
1,183
Magnus Larsson
01/24/2012 04:36PM
Re: avoid filesort  
1,107
Rick James
01/25/2012 08:26PM
Re: avoid filesort  
1,093
Magnus Larsson
01/26/2012 04:56AM
Re: avoid filesort  
1,267
irek kordirko
01/25/2012 07:24PM
Re: avoid filesort  
1,093
Magnus Larsson
01/26/2012 04:57AM
Simple 1-table query taking WAY to long.....  
1,585
Jason Moore
01/23/2012 02:31AM
Re: Simple 1-table query taking WAY to long.....  
1,035
Rick James
01/24/2012 01:09AM
want to make this query faster, but not sure how  
2,261
Luc Foisy
01/19/2012 09:55AM
Re: want to make this query faster, but not sure how  
1,155
irek kordirko
01/19/2012 05:39PM
Re: want to make this query faster, but not sure how  
1,268
Luc Foisy
01/20/2012 10:51AM
Re: want to make this query faster, but not sure how  
865
Luc Foisy
01/19/2012 10:12AM
Re: want to make this query faster, but not sure how  
862
Luc Foisy
01/19/2012 10:29AM
This topic has been moved.:  difference between READ and SCAN  
0
Linhai Song
06/20/2012 05:47PM
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