Question

我有5个表，我希望从所有链接到名为pubs的表中获取数据。

special_offers有3条与酒吧相关的记录 events有4条与pub相关的记录

但是我只回来了第一个事件和special_offers。它似乎没有结构化为多级数组。我尝试过加入和内心联系，我看不出可能出现的问题。

SELECT pubs.*, special_offers.*, `events`.*, vote.* 
  FROM pubs
    Inner Join `events` 
      ON pubs.id = `events`.pubID
    Inner Join special_offers 
      ON pubs.id = special_offers.pubID
    Inner Join vote 
      ON pubs.id = vote.pubID
  WHERE pubs.id = 48

这是print_r的输出

Array (
 [0] => 48
 [id] => 1 Harveys
 [name] => Harveys
 [sun] => 10am-2.30am
 [31] => 1
 [32] => 4
 [special_dayID] => 4
 [33] => 48
 [pubID] => 48
 [34] => 2.50 Drinks
 [title] => Kodakid
 [35] => All drink 2.50 get them while there hot! or cold!
 [desc] => Kodakid are playing!
 [36] => 1
 [37] => 48
 [38] => 2012-04-30
 [date] => 2012-04-30
 [39] => Kodakid
 [40] => & others
 [subtitle] => & others
 [41] => Kodakid are playing!
 [42] => kodakid.jpg
 [img] => kodakid.jpg
 [43] => 1
 [44] => 48
 [45] => 3
 [price_range] => 3
 [46] => 5
 [atmosphere] => 5
 [47] => 2
 [food] => 2
 [48] => 4
 [service] => 4
 [49] => 3
 [value] => 3
 [50] => Waterford City
 [county] => Waterford City )

由于

Answer 1

你是如何进行实际查询的？ MySQL不支持嵌套数组或行。结果集由零个或多个行组成，每行包含一个或多个数字，字符串，日期等。

您正在做的是要求包含所有四个表中所有列的结果集。因为您正在使用INNER联接，所以您要求MySQL仅返回所有四个表中存在的行。因此pubs中events中没有相关行的ID将不会包含在结果集中，即使它在其他两个行中也有行。

要做你要求的事情，你可以使用单独的查询（一个用于事件，一个用于投票等等）。您也可以尝试使用LEFT JOIN而不是INNER JOIN或子查询和聚合器（如GROUP_CONCAT），但这实际上取决于您对信息的计划。

mySQL没有得到所有记录

1 个答案: