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 a.vend_id,count(b.vend_id) from Vendors a left join Products b using(vend_id) group by vend_id order by vend_id
列出供应商及其可供产品的数量
https://www.nowcoder.com/practice/17f22851cf204019b51a36761a3afc79
select a.vend_id,count(b.vend_id) from Vendors a left join Products b using(vend_id) group by vend_id order by vend_id
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