What's The Most Efficient Way?
I've done a database scheme and wonder what the most efficient way of storing certain entries would be. The site will have news, reviews and tutorials and these will be under the same categories. So I'm wondering what the best way to do design the database scheme would be.
Have one table like I've done now in the "content" table with the posibilty to differentiate the entries with the "post_type" field or have three different tables? Below is the table "content".
Field Type Null Default
post_id int(10) No
post_date datetime No 0000-00-00 00:00:00
post_text text No
post_title text No
post_cat_id int(4) No 0
post_description text No
post_name varchar(200) No
post_type int(4) No 0
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Option 3: SELECT p.persid FROM person p, perscolor pc, persmaterial pm WHERE p.persid=pc.persid AND (pc.colorid=1 OR pc.colorid=2 OR pc.colorid=3) AND p.persid=pm.persid AND pm.materialid=2 GROUP BY p.persid HAVING sum(case when pc.colorid in (Ƈ',Ɖ') then 1 else 0 end) >= 1 AND sum(case when pc.colorid=ƈ' then 1 else 0 end)>=1 AND sum(case when pm.materialid=ƈ' then 1 else 0 end)>=1 Remarks: *this option requires the pseudo query to be turned into a product of sums form; again is their a clever way to obtain such a form; Option 4 SELECT DISTINCT pc1.persid FROM perscolor pc1 INNER JOIN perscolor pc2 ON pc1.persid=pc2.persid AND pc2.colorid=2 INNER JOIN persmaterial pm1 ON pc1.persid=pm1.persid AND pm1.materialid=2 LEFT OUTER JOIN perscolor pc3 ON pc1.persid=pc3.persid AND pc3.colorid=1 LEFT OUTER JOIN perscolor pc4 ON pc1.persid=pc4.persid AND pc4.colorid=3 WHERE COALESCE(pc3.persid,pc4.persid) IS NOT NULL Remarks: *this option requires the pseudo query to be turned into a product of sums form Option 5: SELECT p.persid FROM person p, persmaterial pm,perscolor pc1,perscolor pc2,perscolor pc3 WHERE p.persid=pm.persid AND p.persid=pc1.persid AND p.persid=pc2.persid AND p.persid=pc3.persid AND (pc1.colorid=1 OR pc2.colorid=3) AND pc3.colorid=2 AND pm.materialid=2 GROUP BY p.persid Remarks: *very easy to get from pseudo query to MySQL query but what about performance? -- phpMyAdmin SQL Dump -- version 2.6.1 -- http://www.phpmyadmin.net -- -- Host: localhost -- Generation Time: Oct 19, 2006 at 01:13 PM -- Server version: 4.1.9 -- PHP Version: 4.3.10 -- -- Database: `aston` -- -- -------------------------------------------------------- -- -- Table structure for table `color` -- CREATE TABLE `color` ( `colorid` int(11) NOT NULL auto_increment, `color` varchar(30) NOT NULL default '', PRIMARY KEY (`colorid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ; -- -- Dumping data for table `color` -- INSERT INTO `color` VALUES (1, 'red'); INSERT INTO `color` VALUES (2, 'green'); INSERT INTO `color` VALUES (3, 'blue'); INSERT INTO `color` VALUES (4, 'yellow'); -- -------------------------------------------------------- -- -- Table structure for table `material` -- CREATE TABLE `material` ( `materialid` int(11) NOT NULL auto_increment, `material` varchar(30) NOT NULL default '', PRIMARY KEY (`materialid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ; -- -- Dumping data for table `material` -- INSERT INTO `material` VALUES (1, 'wood'); INSERT INTO `material` VALUES (2, 'iron'); -- -------------------------------------------------------- -- -- Table structure for table `perscolor` -- CREATE TABLE `perscolor` ( `perscolorid` int(11) NOT NULL auto_increment, `persid` int(11) NOT NULL default Ɔ', `colorid` int(11) NOT NULL default Ɔ', PRIMARY KEY (`perscolorid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ; -- -- Dumping data for table `perscolor` -- INSERT INTO `perscolor` VALUES (1, 1, 1); INSERT INTO `perscolor` VALUES (2, 1, 2); INSERT INTO `perscolor` VALUES (3, 2, 1); INSERT INTO `perscolor` VALUES (5, 3, 3); INSERT INTO `perscolor` VALUES (6, 3, 2); -- -------------------------------------------------------- -- -- Table structure for table `persmaterial` -- CREATE TABLE `persmaterial` ( `persmatid` int(11) NOT NULL auto_increment, `persid` int(11) NOT NULL default Ɔ', `materialid` int(11) NOT NULL default Ɔ', PRIMARY KEY (`persmatid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=6 ; -- -- Dumping data for table `persmaterial` -- INSERT INTO `persmaterial` VALUES (1, 1, 1); INSERT INTO `persmaterial` VALUES (2, 1, 2); INSERT INTO `persmaterial` VALUES (3, 2, 1); INSERT INTO `persmaterial` VALUES (5, 3, 2); -- -------------------------------------------------------- -- -- Table structure for table `person` -- CREATE TABLE `person` ( `persid` int(11) NOT NULL auto_increment, `name` varchar(30) NOT NULL default '', PRIMARY KEY (`persid`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ; -- -- Dumping data for table `person` -- INSERT INTO `person` VALUES (1, 'john'); INSERT INTO `person` VALUES (2, 'emily'); INSERT INTO `person` VALUES (3, 'liz');
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Slow Query->Efficient Query
I have a query that is running really slow !!!! I have joined on Key fields and indexed the tables fully but it is still solw. -------------------------------------------- select d.id, a.signed, u.Forename, u.Surname, d.paid, p.date, d.payment, p.amount, d.acctual from details d join poten a on a.id = d.id left join recieved p on d.id = p.id left join users u on a.signed = u.userid where d.paid > '01-Dec-2005' and d.authorrceived is not null and d.authorrefused is null and ((d.payment starting 'E' or d.payment starting 'e') or (d.payment starting 'Q' or d.payment starting 'q' and p.target = '500')) order by d.paid, a.signed, d.id
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