0

有没有办法优化这个查询目前这个查询的执行时间是585 在这个查询中只有两个表被使用。一个是包含球员信息的球员详细信息表，另一个是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
4

1 回答 1

0

你用的是mysql还是sqlserver？那些创建语句不适用于 MSSQL。我猜你正在使用 mySQL，并没有用它做很多工作，但这些帖子可以帮助你。

MySql BigInt(20) 与 Int(20) SQL Server BigInt 或 Int

基本上（但未经测试）我猜 Bigint 值不值得，因为这些列上的值非常小。你浪费了很多空间和索引，所有相关的东西也都占用了很多空间。尝试切换到适合您情况的最小数字类型（small int，tinyint？）

于 2012-06-29T10:13:02.047 回答