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Editorial Team
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Asked: 2026-05-15T10:09:46+00:00

I have a many to many table setup in my mysql database. Teams can

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I have a many to many table setup in my mysql database. Teams can be in many games and each game has 2 teams. There is a table in between them called teams_games. SHOW CREATE TABLE information follows.

I have been messing with this query for a while. At this point I don’t care if it requires sub-queries, joins, or unions. I have tried all of them but nothing has been satisfactory and I think i’m missing something. The disconnect I keep having is finding the two team ids from each game and then using the tid to grab the team information.

What I would like to do is if given a game id (gid) I can query to find:

home_team_name, home_team_id, away_team_name, away_team_id, team_league(away and home will be the same league), all the information from games table


Table Create Table

 teams  CREATE TABLE `teams` (
 `tid` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(60) NOT NULL,
`league` varchar(2) NOT NULL,
`active` tinyint(1) NOT NULL,
PRIMARY KEY (`tid`)

)


CREATE TABLE teams_games (

`tid` int(10) unsigned NOT NULL,
`gid` int(10) unsigned NOT NULL,
`homeoraway` tinyint(1) NOT NULL,
PRIMARY KEY (`tid`,`gid`),
KEY `gid` (`gid`),
CONSTRAINT `teams_games_ibfk_1` FOREIGN KEY (`tid`) REFERENCES `teams` (`tid`),
CONSTRAINT `teams_games_ibfk_2` FOREIGN KEY (`gid`) REFERENCES `games` (`gid`)

)


CREATE TABLE games (

`gid` int(10) unsigned NOT NULL AUTO_INCREMENT,
`location` varchar(60) NOT NULL,
`time` datetime NOT NULL,
`description` varchar(400) NOT NULL,
`error` smallint(2) NOT NULL,
`home_score` smallint(2) DEFAULT NULL,
`away_score` smallint(2) DEFAULT NULL,
PRIMARY KEY (`gid`)

)

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1 Answer

  1. Editorial Team

    I assumed homeoraway = 1 for home and homeoraway = 0 for away.

    SELECT g.*, ht.name, ht.tid, at.name, at.tid, ht.league
FROM games g
JOIN team_games htg ON htg.gid = g.gid AND htg.homeoraway = 1
JOIN team ht ON ht.tid = htg.tid
JOIN team_games atg ON atg.gid = g.gid AND atg.homeoraway = 0
JOIN team at ON at.tid = atg.tid

    This works by joining games to team_games for the home team, then to teams for the team info, then doing the same thing for the away team.

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