183. 从不订购的客户
# 498ms select c.Name as Customers from Customers c left join Orders o on o.CustomerId = c.Id where o.Id is null; # 532ms select c.Name as Customers from Customers c where not exists (select 1 from Orders o where o.CustomerId = c.Id); # 455ms select c.Name as Customers from Customers c where c.Id not in (select distinct o.CustomerId from Orders o);
![](https://images.cnblogs.com/cnblogs_com/qianjinyan/910455/o_jasmine%20love.gif)
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