有没有办法优化此查询当前此查询的执行时间为 585 在此查询中只使用了两个表。一个是玩家详细信息表，其中包含玩家信息＆amp;其他是corn_player_data包含得分记录
SELECT
t.players_id,
t.players_name,
t.added_date,
t.total_death AS total_death,
t.total_king AS total_king,
GROUP_CONCAT(t.week_number) AS week_number,
GROUP_CONCAT(t.death) AS Death,
GROUP_CONCAT(t.King) AS King
FROM (SELECT
p.id AS players_id,
p.name AS players_name,
cpd.added_date AS added_date,
cpd4.total_death AS total_death,
cpd5.total_king AS total_king,
WEEK(cpd.added_date) AS week_number,
GROUP_CONCAT(cpd.added_date) AS NewDate,
COUNT(cpd3.result) AS death,
COUNT(cpd2.result) AS King
FROM players AS p
LEFT JOIN cron_players_data AS cpd
ON cpd.player_id = p.id
LEFT JOIN cron_players_data cpd2
ON cpd2.player_id = p.id
AND cpd2.result = 1
AND cpd2.status = 1
AND cpd2.added_date = cpd.added_date
LEFT JOIN cron_players_data cpd3
ON cpd3.player_id = p.id
AND cpd3.result = 2
AND cpd3.status = 1
AND cpd3.added_date = cpd.added_date
LEFT JOIN (SELECT
cron_p_d.player_id,
COUNT(cron_p_d.result) AS total_death
FROM cron_players_data cron_p_d
WHERE cron_p_d.result = 2
AND cron_p_d.status = 1
GROUP BY (cron_p_d.player_id)) AS cpd4
ON cpd4.player_id = p.id
LEFT JOIN (SELECT
cro_p_d.player_id,
COUNT(cro_p_d.result) AS total_king
FROM cron_players_data cro_p_d
WHERE cro_p_d.result = 1
AND cro_p_d.status = 1
GROUP BY (cro_p_d.player_id)) AS cpd5
ON cpd5.player_id = p.id
GROUP BY (p.id),WEEK(cpd.added_date)) AS t
GROUP BY t.players_id
TABLE CREATE TABLE
----------------- ---------------------------------------------------------
cron_players_data CREATE TABLE `cron_players_data` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`cat_id` BIGINT(30) DEFAULT '0',
`sub_cat_id` BIGINT(30) DEFAULT '0',
`team_id` BIGINT(30) DEFAULT '0',
`player_id` BIGINT(30) DEFAULT '0',
`status_team` VARCHAR(225) DEFAULT NULL,
`result` BIGINT(30) DEFAULT '0',
`home` BIGINT(30) UNSIGNED DEFAULT '0',
`guest` BIGINT(30) UNSIGNED DEFAULT '0',
`mvp` BIGINT(30) DEFAULT '0',
`oscar` BIGINT(30) DEFAULT '0',
`wam` BIGINT(30) DEFAULT '0',
`crown` BIGINT(30) DEFAULT '0',
`kiss` BIGINT(30) DEFAULT '0',
`slap` BIGINT(30) DEFAULT '0',
`bomb` BIGINT(30) DEFAULT '0',
`status` TINYINT(1) DEFAULT '0',
`added_date` DATE DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=MYISAM AUTO_INCREMENT=265 DEFAULT CHARSET=utf8
TABLE CREATE TABLE
------- -----------------------------------------
players CREATE TABLE `players` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`cat_id` BIGINT(30) DEFAULT '0',
`sub_cat_id` BIGINT(30) DEFAULT '0',
`team_id` BIGINT(30) DEFAULT '0',
`name` VARCHAR(225) DEFAULT NULL,
`class_name` VARCHAR(225) DEFAULT NULL,
`image` VARCHAR(225) DEFAULT NULL,
`added_date` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=MYISAM AUTO_INCREMENT=147 DEFAULT CHARSET=utf8
输出将是这样的
players_id players_name added_date total_death total_king week_number Death King
81 Mario Chalmers 2012-06-08 6 7 23,24,25,26 2,3,1,0 0,2,4,1
82 Udonis Haslem 2012-06-09 2 7 23,24,25,26 0,1,0,1 1,1,4,1
83 James Jones 2012-06-09 10 3 23,24,25,26 0,7,3,0 1,0,1,1
84 Chris Bosch 2012-06-09 8 4 23,24,25,26 1,4,2,1 0,2,2,0
85 Dwayne Wade 2012-06-09 6 4 23,24,25,26 1,3,1,1 0,2,2,0
86 Eddie House 2012-06-09 5 4 23,24,25,26 0,3,2,0 1,1,1,1
87 Joel Anthony 2012-06-09 6 6 23,24,25,26 1,3,1,1 1,2,3,0
88 Mike Bibby 2012-06-08 5 9 23,24,25,26 0,3,1,1 2,3,4,0
89 Mike Miller 2012-06-09 7 8 23,24,25,26 1,4,1,1 1,2,4,1
90 Erick Dampier 2012-06-09 11 1 23,24,25,26 2,5,2,2 0,0,1,0
91 Lebron James 2012-06-09 7 4 23,24,25,26 1,4,1,1 0,2,2,0
92 Juwan Howard 2012-06-08 5 4 23,24,25,26 1,2,1,1 0,1,3,0
答案 0 :(得分：0)
您使用的是mysql还是sqlserver？那些创建语句不适用于MSSQL。我猜你使用的是mySQL，并没有很多使用它，但这些帖子可以帮到你。
MySql BigInt(20) vs Int(20) SQL Server BigInt or Int
基本上（还没有测试）我猜Bigint值不值，因为你在这些列上的值非常小。你浪费了很多空间和索引，所有相关的东西也花了不少钱。尝试切换到适合您案例的最小数字类型（小int，tinyint？）