sql - 显示一个表中的项目计数和另一个表中的所有列

Question

For each pizza, display its count of rows in Stock
followed by all its columns in Product.  

库存表

   s_inv - Text - foreign key to Product
   s_num
   s_in_stock

产品表

 p_inv - Text - Primary Key
 p_name
 p_price

Answer 1

更改您的代码并尝试此操作。

select p.p_inv,p.p_namep.p_price,count(select * from stock where s.s_inv=p.p_inv) from product p, stock s;

Answer 2

在 sql 服务器中：

select p.p_inv,
       p.p_name,
       p.p_price,
       s.s_num,
       s.s_in_stock,
       count(select * from product p,stock s where p.p_inv=s.s_inv) 
as rows_count 
from product p 
join stock s on p.p_inv=s.s_inv 
order by p.s_inv;