Mysql 复杂查询加入

Question

我需要一些帮助来加入下面的查询，因为我认为这是非常繁重的，While 循环嵌套在其他 while 循环中……一团糟，对吧？！ :(

这行得通，但如果有人可以帮助将其加入一个查询中：

$query_1 = mysql_query("SELECT * FROM booking_reservation WHERE reservation_confirmed = '1' AND (reservation_name LIKE '$data%' OR reservation_phone LIKE '$data%' OR reservation_email LIKE '$data%')");

    while ($row = mysql_fetch_array($query_1)) {
        $calendar_id = $row['calendar_id'];
        $query_2 = mysql_query("SELECT * FROM booking_calendars WHERE calendar_id = '$calendar_id'");
        $row_2 = mysql_fetch_array($query_2);
        $slot_id = $query_1['slot_id'];
        $query_3 = mysql_query("SELECT * FROM booking_slots WHERE slot_id = '$slot_id'");
        while ($row_3 = mysql_fetch_array($query_3)) {
            echo '<tr><td>' . htmlentities($row2['slot_date']) . '</td><td>' . htmlentities($query_3['slot_time_from']) . '</td><td>' .  htmlentities($query_1['reservation_name']) . '</td><td>' .  htmlentities($query_3['calendar_title']) . '</td><td>' . htmlentities($query_1['reservation_phone']) . '</td><td>' . htmlentities($query_1['reservation_email']) . '</td></tr>';
        }
    }

Answer 1

其中之一应该是您想要的，如果您想获得仅存在于 booking_calendars 和 booking_slots 或 LEFT JOIN 中的预订，您可以使用 INNER JOIN如果您想要所有预订，无论它们是否存在于其他 tables

内部联接：

SELECT * FROM booking_reservation br 
INNER JOIN booking_calendars bc ON br.calendar_id=bc.calendar_id 
INNER JOIN booking_slots bs ON br.slot_id=bs.slot_id 
WHERE br.reservation_confirmed = '1' 
AND (br.reservation_name LIKE '$data%' 
OR br.reservation_phone LIKE '$data%' 
OR br.reservation_email LIKE '$data%')

左连接：

SELECT * FROM booking_reservation br 
LEFT JOIN booking_calendars bc ON br.calendar_id=bc.calendar_id 
LEFT JOIN booking_slots bs ON br.slot_id=bs.slot_id 
WHERE br.reservation_confirmed = '1' 
AND (br.reservation_name LIKE '$data%' 
OR br.reservation_phone LIKE '$data%' 
OR br.reservation_email LIKE '$data%')

1 重要提示，不推荐使用 SELECT *，最好告诉 mysql 您需要从每个 table 或 table 您正在选择。

N.B.: 你应该听听 Raptor 说的，mysql_* functions are deprecated and will be removed in later php versions, you should开始使用 PDO or mysqli

Answer 2

试试这个，我希望这个查询对你有用

select * from booking_reservation br  
join booking_calendars bc ON br.calendar_id=bc.calendar_id 
join booking_slots bs ON bc.slot_id=bs.slot_id
where br.reservation_confirmed='1' 
AND br.(reservation_name LIKE '$data%' OR br.reservation_phone LIKE '$data%' OR br.reservation_email LIKE '$data%')

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