표시 한 테이블에있는 항목의 수와 다른

Question

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

주식 표

s_inv - Text - foreign key to Product 
    s_num 
    s_in_stock 

제품 표

p_inv - Text - Primary Key 
p_name 
p_price 

Answer 1

SQL 서버에서

:

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; 

Answer 2

의 모든 그것의 열은 코드를 변경하고 이것을 시도.

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;