November 23, 2008 01:10am pst

1. angelIII 840,951
2. hielo 463,136
3. routinet 275,450
4. hernst42 254,855
5. ee_rlee 219,254
6. mankowitz 206,587
7. ushastry 186,962
8. yodercm 155,304
9. fibo 133,310
10. cedlinx 128,742
11. Ray_Pas... 127,511
12. virmaior 126,822
13. leannonn 110,570
14. cxr 88,568
15. adrpo 87,450
16. TerryAtO... 81,800
17. logudotcom 81,165
18. mark_wills 75,635
19. theGhost... 75,523
20. arnold 75,419
21. TomasHelgi 73,674
22. bportlock 72,239
23. nplib 70,560
24. mattaob 69,744
25. teraplane 65,970

1. angelIII 2,196,790
2. todd_far... 1,724,617
3. snoyes_jw 765,508
4. Raynard7 704,144
5. hernst42 613,555
6. Squeebee 555,077
7. leannonn 489,506
8. hielo 467,736
9. ushastry 392,464
10. NovaDeni... 373,934
11. routinet 373,655
12. akshah123 327,468
13. psadac 320,695
14. virmaior 319,088
15. AdrianSRU 317,146
16. yodercm 313,173
17. mankowitz 298,809
18. fibo 277,443
19. ee_rlee 219,254
20. teraplane 193,956
21. ldbkutty 184,558
22. racek 181,131
23. steelseth12 177,995
24. glcummins 176,290
25. gamebits 173,436

08.20.2008 at 05:58AM PDT, ID: 23662885

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7.4

Help optimizing query with ORDER BY

Asked by logicmedia in MySQL Server

Tags: SQL, MySQL

I have this simple query:

SELECT n.*, ROUND(c.rate * n.price / 100,2) AS priceDKK FROM newDVD n, currency c, sites s WHERE n.currency = c.code AND n.site = s.code AND (s.country = 'all' OR INSTR(s.country, 'dk') > 0) ORDER BY title ASC

Which takes about 8 seconds to execute which is way too much. I have found out that if I remove the ORDER BY statement the query suddenly takes less than 0.01 seconds.

Is there a way to optimize this and still get the rows sorted by title??

My tables look like this:

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             CREATE TABLE IF NOT EXISTS `newDVD` (
  `ID` bigint(20) NOT NULL auto_increment,
  `site` varchar(255) collate latin1_danish_ci NOT NULL,
  `title` varchar(255) collate latin1_danish_ci NOT NULL,
  `deeplink` varchar(255) collate latin1_danish_ci NOT NULL,
  `afflink` varchar(255) collate latin1_danish_ci NOT NULL,
  `price` float NOT NULL,
  `currency` varchar(3) collate latin1_danish_ci NOT NULL,
  `region` varchar(10) collate latin1_danish_ci NOT NULL,
  `description` text collate latin1_danish_ci NOT NULL,
  `subtitles` varchar(255) collate latin1_danish_ci NOT NULL,
  `genre` varchar(255) collate latin1_danish_ci NOT NULL,
  `extrafound` enum('yes','no') collate latin1_danish_ci NOT NULL default 'no',
  `image` varchar(255) collate latin1_danish_ci NOT NULL,
  `date` date NOT NULL,
  `instock` enum('yes','no') collate latin1_danish_ci NOT NULL default 'yes',
  `preorder` enum('yes','no') collate latin1_danish_ci NOT NULL default 'no',
  `timestamp` datetime NOT NULL,
  PRIMARY KEY  (`ID`),
  KEY `currency` (`currency`),
  KEY `site` (`site`),
  KEY `title` (`title`),
  FULLTEXT KEY `search` (`title`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_danish_ci AUTO_INCREMENT=4404278 ;
 
CREATE TABLE IF NOT EXISTS `currency` (
  `ID` bigint(20) NOT NULL auto_increment,
  `code` varchar(5) collate latin1_danish_ci NOT NULL,
  `rate` float NOT NULL,
  `date` date NOT NULL,
  `timestamp` datetime NOT NULL,
  PRIMARY KEY  (`ID`),
  KEY `code` (`code`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_danish_ci AUTO_INCREMENT=1181 ;
 
CREATE TABLE IF NOT EXISTS `sites` (
  `ID` bigint(20) NOT NULL auto_increment,
  `name` varchar(255) collate latin1_danish_ci NOT NULL,
  `URL` varchar(255) collate latin1_danish_ci NOT NULL,
  `code` varchar(25) collate latin1_danish_ci NOT NULL,
  `approved` enum('yes','no') collate latin1_danish_ci NOT NULL default 'no',
  `country` varchar(255) collate latin1_danish_ci NOT NULL default 'all',
  PRIMARY KEY  (`ID`),
  KEY `code` (`code`),
  KEY `country` (`country`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_danish_ci AUTO_INCREMENT=11 ;

           
         

Keywords: Help optimizing query with ORDER BY

	Title
1	Sybase query optimization urgent ques…
2	optimize
3	Optimal Development Envirnoment
4	Database Query Optimization
5	Optimization MySQL / Apache
6	Optimizing sql databases

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20081112-EE-VQP-43 / EE_QW_2_20070628

Help optimizing query with ORDER BY

Asked by logicmedia in MySQL Server

Tags: SQL, MySQL

About this solution