SELECT ManagerID AS Manager,COUNT(*) AS Reports FROM Human.Resources.Employee2 WHERE EmployeeID !=5 GROUP BY ManagerID HAVING COUNT(*)>3 ;
having 是聚合以后算的,很棒。where 是聚合以前算的。
用FOR XML子句可以输出XML格式。
ALL DISTINCT的用法。
SELECT ManagerID AS Manager,COUNT(*) AS Reports FROM Human.Resources.Employee2 WHERE EmployeeID !=5 GROUP BY ManagerID HAVING COUNT(*)>3 ;
having 是聚合以后算的,很棒。where 是聚合以前算的。
用FOR XML子句可以输出XML格式。
ALL DISTINCT的用法。