结合这两个查询

Question

我有2个查询。

public function fetchEvents(){

    $events = $this->cmsdb->query("SELECT * FROM tickets_events WHERE `active` = 1", true); //true just means if only one row is returned it will be key [0] so I can loop no matter how many rows returned

if(empty($events)){
    return array();
    }
    foreach ($events as $k => $event) {
        $events[$k]['items'] = $this->cmsdb->query("SELECT *, FROM_UNIXTIME(date, '%W, %D %M %Y') as dateString
                               FROM tickets_items WHERE eventId = '" . intval($event['id']) . "'
                               AND public = 1 AND confirmed = 1 AND date > '" . time() . "'
                               ORDER BY date ", true);
    }
    return $events;
}

我已经简化了第一个查询，我将一些参数传递给函数来过滤它返回的事件，但那部分与这个问题无关。

如果我想获得每个事件及其项目，我会遇到的问题是，它正在进行大量查询（目前有691个事件）。 无论如何，我可以将这些查询组合在一起吗？

Answer 1

您可以JOIN的表结合在一起，得到同样的答案。 这应该是更好的表现，以及：

SELECT 
     i.*
    ,FROM_UNIXTIME(i.date, '%W, %D %M %Y') as dateString
FROM tickets_items  i
JOIN tickets_events e
  ON i.eventId = e.id
WHERE i.public    = 1
  AND i.confirmed = 1
  AND e.active    = 1
  AND date > CURRENT_TIMESTAMP
ORDER BY date