그룹핑 셋 Grouping Sets 함수 2008년에 소개된 이 기능은 다음과 같은 예시를 간단하게 해결하기 위한 것이다. Select Country, Gender, Sum(Salary) as TotalSalary From Employees Group By Country, Gender UNION ALL Select Country, NULL, Sum(Salary) as TotalSalary From Employees Group By Country UNION ALL Select NULL, Gender, Sum(Salary) as TotalSalary From Employees Group By Gender UNION ALL Select NULL, NULL, Sum(Salary) as TotalSalary Fr..