将 2 个 SQL 合二为一

Question

$sql = "SELECT teams.id,teams.name,teams.updated
        FROM teams 
        ORDER BY teams.name ASC";
list($teams) = getrows($sql);

foreach($teams as $team)
{
    $sql = "SELECT time FROM events WHERE (home_team='".$team['id']."' OR away_team='".$team['id']."') AND (status='FT' OR status='PEN' OR status='AET') ORDER BY time DESC LIMIT 1";
    

所以我希望将它们组合成 1 sql 但我在尝试使用第一个 sql 的验证时遇到问题，如果我使用 LEFT JOIN (SELECT * FROM events WHERE team.id='|team from first query|')子查询中的原始团队 ID。 如果这有道理。

谢谢

Answer 1

我希望我正确理解了一切

SELECT MAX(events.time) AS latest_time, teams.id, teams.name, teams.updated
FROM events 
LEFT JOIN teams ON events.home_team=teams.id OR events.away_team=teams.id
WHERE ...
ORDER BY ...
GROUP BY teams.id

分组，因为我认为您在表事件中每个 team.id 有多行。 然后您可以使用 MAX() 提取最高（最新）时间。