编写查询以排列DB表的产品和类别

Question

我有两个表用于产品，另一个表是类别

我有一个包含category和subcategory字段的表。我想要特定类别下不同子类别的总和。像表

cat_id| category | 
------+--------------+--
1     |  Cloth       |  
2     |  Food       |  
3     |  Fuel        |  
4     |  School      |  

另一个是产品表

  id|    name   |  cat_id |
 ------+-----------+---------+--
    1  |  skirt    |  1
    2  |  shirt    |  1
    3  |  St Xavier|  4
    4  |  Petrol   |  3

现在我希望结果

  id  |    name   |  cat_name |
------+-----------+---------+--
   1  |  skirt    |  Cloth
   2  |  shirt    |  Cloth
   3  |  St Xavier|  School
   4  |  Petrol   |  School

我的Sql查询是什么，请帮助!!!

Answer 1

SELECT p.`id` AS "id" , p.`name`AS "Product Name",c.`category`AS "Category" 
FROM `product` p
INNER JOIN `category`c ON (p.`cat_id`=c.`cat_id`)  
ORDER BY p.`id` ASC

Answer 2

试试这个

SELECT A.id, A.name, B.category AS cat_name 
FROM product A, category B 
WHERE A.cat_id=B.cat_id