sql - SQL 查询帮助：选择当月的随机员工

Question

谁能告诉我如何从这个声明中获取记录

• 选择最近 x 个月内不是当月员工的随机员工

表员工
ID
EmployeeName

表 EmployeeOfTheMonth
ID
EmployeeID
MonthStartedDate
MonthEndedDate

非常感谢

Answer 1

select top 1 id from employee as emp 
where not exist(
    select top 1 * 
      from employeeofthemonth as em 
      where em.id = emp.id and dateadd(m, -6, getdate()) < monthendeddt )
order by newid()

...或类似的东西。我没有运行 sql，但在 mssql 服务器上，这应该是正确的。

Answer 2

修改最后一个答案，我更喜欢使用 IN 语句

DECLARE @xMonth INT
SET @xMonth = 3


SELECT TOP 1 ID
FROM Employee
WHERE ID NOT IN (SELECT EmployeeID 
FROM EmployeeOfTheMonth
WHERE DATEADD(m, -@xMonth, GETDATE()) < MonthEndedDate)
ORDER BY NEWID()