题解 | #列出供应商及其可供产品的数量#
列出供应商及其可供产品的数量
https://www.nowcoder.com/practice/17f22851cf204019b51a36761a3afc79
select Vendors.vend_id,count(prod_id) from Vendors left join Products on Products.vend_id=Vendors.vend_id group by Vendors.vend_id order by Vendors.vend_id;
查看2道真题和解析