聚合函数的SQL比较

Question

当我在ACCESS 2007中运行以下SQL时

选择位置,COUNT(公寓楼)AS TotalBuildings管理公寓COUNT(公寓楼)> 3按地点排序按COUNT(ApartmentBuildings)DESC;

我收到以下错误:

在where子句中不能有聚合函数.如何构建此查询以获取所有具有大于3的ApartmentBuildings数量的位置？

Answer 1

使用having而不是where:

Select Location, COUNT(ApartmentBuildings) AS TotalIBuildingsManaged 
From Apartments 
Group By Location
Having COUNT(ApartmentBuildings) > 3  
Order By COUNT(ApartmentBuildings) DESC;

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