I have two tables, 'Customers' and 'Employees' that are joined over the third table 'Orders'I have two tables, 'Customers' and 'Employees'
阅读背景：
SQL选择至少有2个订单的员工，其中至少有一个订单位于某个区域，没有嵌套的SQL块
来源：互联网
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