php - 是否可以使查询结果运行另一个查询？

Question

我有这个查询:

$aircraft_query = "SELECT COUNT(aircraft) as total, aircraft FROM db_pireps WHERE pilotid = $pilotid GROUP BY aircraft ORDER BY total DESC LIMIT 6";
$planes = DB::get_results($aircraft_query);

使用 foreach 语句，我可以在表中生成行以显示 pilotid 飞行的飞机。但是，我现在想要 RESULT链接到另一个表并从其中提取数据，例如 fullname 中的飞机类型专栏。

我有这个:<?php echo $aircraft->fullname; ?>但该数据位于不同的表中。所以，如果aircraft为 30，它将访问 db_aircrafts 中的第 30 条记录表并采取 fullname柱子。我怎样才能做到这一点？这可能吗？

Answer 1

你需要的是一个表JOIN (另请参阅 JOIN in MySQL manual ):

SELECT 
    COUNT(a.aircraft) as total
    , a.aircraft
    , b.fullname AS aircraft_name
FROM db_pireps AS a
JOIN db_aircraft AS b
    ON a.aircraft = b.id
WHERE pilotid = {$pilotid}
GROUP BY aircraft 
ORDER BY total DESC 
LIMIT 6