显示类别中最受欢迎条目的MYSQL查询

Question

我有一个存储人们兴趣的数据库，我有一个查询，该查询遍历我的兴趣表并根据类别categoryID列出了最受欢迎的兴趣。 但是，我只能显示categoryID而不是类别名称，如何在表类别中链接以显示类别名称而不是ID？

这是我的查询和输出：

PHP：

$interestCatPopular = "SELECT interest_desc, categoryID, MAX(num_in_cat) AS num_in_cat 
FROM
(
   SELECT interest_desc, categoryID, COUNT(categoryID) AS num_in_cat
   FROM interests
   GROUP BY interest_desc, categoryID
 ) subsel 
 GROUP BY interest_desc, categoryID";
 $mostPopularInterest = mysql_query($interestCatPopular) or die(mysql_error());

 $arrayResults = array();
 while ($row = mysql_fetch_assoc($mostPopularInterest)) {
 $arrayResults[] = $row;
 }

 foreach ($arrayResults as $result) {
 echo "{$result['interest_desc']} was the most popular in category   {$result['categoryID']}    with {$result['num_in_cat']} occurrences\n";
 }

OUTPUT：

足球在9类中最受欢迎，出现10次山羊在4类中最受欢迎，出现1次，Phil在2类中最受欢迎，出现59次

谢谢

更新

表结构-
兴趣：

 Field  Type    Collation   Attributes  Null    Default Extra   Action
interestID  int(11)         No  None    AUTO_INCREMENT                          
name    varchar(100)    utf8_general_ci     No  None                                 
categoryID  varchar(30) utf8_general_ci     No  None                                 
interest_desc   text    utf8_general_ci     No  None                                 
date    timestamp           No  CURRENT_TIMESTAMP   

类别：

Field   Type    Collation   Attributes  Null    Default Extra   Action
categoryID  int(11)         No  None    AUTO_INCREMENT                          
category_desc   varchar(100)    utf8_general_ci     No  None                                                        

Answer 1

您为什么不像这样将两个表连接在一起：

SELECT interest_desc, 
       (
         select categoryName 
         from categories where categoryID = subsel.categoryId
       ), MAX(num_in_cat) AS num_in_cat 
FROM ( 
      SELECT interest_desc, categoryID, 
      COUNT(categoryID) AS num_in_cat 
      FROM interests GROUP BY interest_desc, categoryID
) 
subsel 
GROUP BY interest_desc, categoryID