选择和计数通过

Question

类别

行我尝试做一些代码，但我发现了一些问题......

这是我的表....

类别表

+---------------------------+-----------------------+ 
+ id_category    + name     + 
+---------------------------+-----------------------+ 
+ 1      + Adidas    + 
+ 2      + Logo     + 
+ 3      + Levis    + 
+---------------------------+-----------------------+ 

项目表：

+---------+-----------------+-----------------------+ 
+ id_item + id_category + name     + 
+---------+-----------------+-----------------------+ 
+ 1  +  1   + T-Shirt003   + 
+ 2  +  2   + LogoShoes   + 
+ 3  +  3   + Panty003    + 
+---------------------------+-----------------------+ 

，我想打一个结果是这样的：

No. Category   Total Item 
1.  Adidas    1 
2.  Logo    1 
3.  Levis    1 

任何人都可以帮助我吗？

Answer 1

使用GROUP BY选项

SELECT 
    COUNT(item_table.id_category) as total, 
    category_table.name 
FROM 
    category_table 
    INNER JOIN item_table ON item_table.id_category = category_table.id_category 
GROUP BY 
    id_category