Mysql query optimization - its really slow - mysql

Question

I have next log.
Please somebody explain me where is the problem.
My table deals is 142906 why is it taking so much time?
# Query_time: 5.524629 Lock_time: 0.000059 Rows_sent: 3 Rows_examined: 142906
SET timestamp=1381963341;
SELECT *,1 as distance FROM deals
WHERE end_date > '1381959736'
GROUP BY title
ORDER BY COALESCE(distance, 999999999) , distance ASC LIMIT 0 , 3;
Here is ddl.
CREATE TABLE `deals` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`sku` varchar(180) NOT NULL DEFAULT '',
`price` decimal(8,2) DEFAULT NULL,
`retail_price` decimal(8,2) DEFAULT NULL,
`category` int(1) DEFAULT '4',
`advertiser` varchar(120) DEFAULT NULL,
`image_url` varchar(255) DEFAULT NULL,
`tiks` int(5) DEFAULT NULL,
`buy_url` varchar(255) DEFAULT NULL,
`description` text,
`views` int(6) NOT NULL DEFAULT '1',
`title` varchar(100) DEFAULT NULL,
`brand` varchar(100) DEFAULT NULL,
`api` varchar(50) DEFAULT NULL,
`discount` int(2) DEFAULT NULL,
`black_list` smallint(1) DEFAULT '0',
`gender` tinyint(1) DEFAULT NULL,
`sort` tinyint(1) DEFAULT NULL,
`is_home` tinyint(1) DEFAULT NULL,
`is_quick_shop` tinyint(1) DEFAULT NULL,
`date_add` int(11) DEFAULT NULL,
`is_sale` tinyint(1) DEFAULT NULL,
`is_new` tinyint(1) DEFAULT NULL,
`is_brand_show` tinyint(1) DEFAULT NULL,
`date_modified` int(11) NOT NULL DEFAULT '0',
`modifier_id` smallint(2) DEFAULT NULL,
`modified` smallint(1) DEFAULT NULL,
`longitute` decimal(10,8) DEFAULT NULL,
`latitute` decimal(10,8) DEFAULT NULL,
`is_deal` tinyint(1) DEFAULT NULL,
`best_seller` tinyint(1) DEFAULT NULL,
`home_cat` int(2) DEFAULT NULL,
`end_date` int(11) DEFAULT NULL,
`temp_category` varchar(120) DEFAULT NULL,
`update_cron` smallint(1) unsigned DEFAULT '1',
`alias` varchar(120) DEFAULT NULL,
`found_by` text,
`fb_share` smallint(3) DEFAULT NULL,
`tw_share` smallint(3) DEFAULT NULL,
`pin_share` smallint(3) DEFAULT NULL,
`google_share` smallint(3) DEFAULT NULL,
`last_tiked` int(11) DEFAULT NULL,
`is_simple` smallint(1) DEFAULT '0',
`dealer_id` int(3) DEFAULT NULL,
`clicks` int(5) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `sku` (`sku`),
KEY `tiks` (`tiks`),
KEY `category` (`category`),
KEY `bests` (`best_seller`),
KEY `ne` (`is_new`),
KEY `qu` (`is_quick_shop`),
KEY `end_date` (`end_date`),
KEY `lat` (`latitute`),
KEY `lon` (`longitute`),
KEY `alias` (`alias`),
FULLTEXT KEY `title` (`title`),
FULLTEXT KEY `desc` (`description`),
FULLTEXT KEY `brand` (`brand`),
FULLTEXT KEY `advertiser` (`advertiser`),
FULLTEXT KEY `found_by` (`found_by`)
) ENGINE=MyISAM AUTO_INCREMENT=1861942 DEFAULT CHARSET=utf8

Answer 1

Assuming end_date is a date, convert the number into a date type using FROM_UNIXTIME()
SELECT *, 1 as distance
FROM deals
WHERE end_date > FROM_UNIXTIME(1381959736)
GROUP BY title
ORDER BY COALESCE(distance, 999999999), distance ASC
LIMIT 0, 3;
That way mysql doesn't have the cast every row's end_date to a string, which is very slow. It can also use an index if one exists, so make sure you have one:
create index deals_end_date on deals(end_date);