Postgresql 在另一列中选择具有不同赋值的对象

简化了我在这个表中的问题，我想在PostgreSQL中只选择已经付款的人，我有另外一个已经付款和没有付款的人，我想排除这些人，谢谢

People Payment Debt/n
John   Pay     $100
John   Paid    $200
Luis   Paid    $150   
Luis   Paid    $300

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您可以在此处使用条件聚合：

SELECT People
FROM yourTable
GROUP BY People
HAVING COUNT(*) FILTER(WHERE Payment = 'Pay') = 0;

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这可能是另一种选择，假设您的表名为“people\u payments”

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在这种情况下，结果应该是什么？

Select People from people_payments 
where Payment='Paid'
and People NOT IN (Select People from people_payments where Payment='Pay') ;