php - MySQL INNER JOIN 查询问题

Question

我创建了一个 INNER JOIN 查询，如下所示，我想知道如何让它工作？我需要 HomeTeam 和 AwayTeam 在查询中等于 TeamID。任何帮助将非常感激。谢谢

$result = mysqli_query($con,"SELECT results.*,team.TeamName 
                             FROM results 
                                INNER JOIN team ON team.TeamID = results.HomeTeam 
                                INNER JOIN team on team.TeamID = results.AwayTeam");

Answer 1

您需要为包含两次的表使用别名。否则mysql无法区分两者。

为了能够轻松处理结果，您可以对您选择的名称执行相同的操作。

类似于:

SELECT 
    results.*, 
    t1.TeamName AS TeamNameHome,
    t2.TeamName AS TeamNameAway
FROM results 
INNER JOIN team t1
    ON t1.TeamID = results.HomeTeam 
INNER JOIN team t2
    ON t2.TeamID = results.AwayTeam