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SQL Basics: Simple JOIN with COU

SQL Basics: Simple JOIN with COU

作者: 是不及呀 | 来源:发表于2019-05-13 16:50 被阅读0次
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链接 SQL Basics: Simple JOIN with COUNT
难度 7kyu
状态
日期 2019-5-13

题意

题解1

select people.id , people.name , count(toys.id) as toy_count
from people
left join toys
on people.id = toys.people_id
group by people.id

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