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POSQL: GROUP BY after JOIN without overriding rows?
 

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  1. POSQL: GROUP BY after JOIN without overriding rows?
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    <p>I have a table of basketball leagues, a table af teams and a table of players like this:</p> <pre><code>LEAGUES ID | NAME | ------------------ 1 | NBA | 2 | ABA | TEAMS: ID | NAME | LEAGUE_ID ------------------------------ 20 | BULLS | 1 21 | KNICKS | 2 PLAYERS: ID | TEAM_ID | FIRST_NAME | LAST_NAME | --------------------------------------------- 1 | 21 | John | Starks | 2 | 21 | Patrick | Ewing | </code></pre> <p>Given a League ID, I would like to retrieve all the players' names and their team ID from all the teams in that league, so I do this:</p> <pre><code>SELECT t.id AS team_id, p.id AS player_id, p.first_name, p.last_name FROM teams AS t JOIN players AS p ON p.team_id = t.id WHERE t.league_id = 1 </code></pre> <p>which returns:</p> <pre><code>[0] =&gt; stdClass Object ( [team_id] =&gt; 21 [player_id] =&gt; 1 [first_name] =&gt; John [last_name] =&gt; Starks ) [1] =&gt; stdClass Object ( [team_id] =&gt; 21 [player_id] =&gt; 2 [first_name] =&gt; Patrick [last_name] =&gt; Ewing ) + around 500 more objects... </code></pre> <p>Since I will use this result to populate a dropdown menu for each team containing each team's list of players, I would like to group my result by team ID, so the loop to create these dropdowns will only have to cycle through each team ID instead of all 500+ players each time. </p> <p>But when I use the GROUP BY like this:</p> <pre><code>SELECT t.id AS team_id, p.id AS player_id, p.first_name, p.last_name FROM teams AS t JOIN players AS p ON p.team_id = t.id WHERE t.league_id = 1 GROUP BY t.id </code></pre> <p>it only returns one player from each team like this, overriding all the other players on the same team because of the use of the same column names. </p> <pre><code>[0] =&gt; stdClass Object ( [team_id] =&gt; 21 [player_id] =&gt; 2 [first_name] =&gt; Patrick [last_name] =&gt; Ewing ) [1] =&gt; stdClass Object ( [team_id] =&gt; 22 [player_id] =&gt; 31 [first_name] =&gt; Shawn [last_name] =&gt; Kemp ) etc... </code></pre> <p>I would like to return something like this:</p> <pre><code>[0] =&gt; stdClass Object ( [team_id] =&gt; 2 [player_id1] =&gt; 1 [first_name1] =&gt; John [last_name1] =&gt; Starks [player_id2] =&gt; 2 [first_name2] =&gt; Patrick [last_name2] =&gt; Ewing +10 more players from this team... ) +25 more teams... </code></pre> <p>Is it possible somehow?</p>
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    1. USJohn Woo
    1. USacrmuui
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      1. POSQL: GROUP BY after JOIN without overriding rows?
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      1. VTUpMod
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    1. COPlease specify which database you use!
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      1. USppeterka
    2. COsql result returns only 1-dimensional array. it should be handed on your code.
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      1. USJohn Woo
    3. COSorry, I use MySQL.
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      1. USacrmuui
 

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