检索最少有3名职工的每个部门的职工工资总额

A．SELECT 部门号，COUNT(*)，SUM(工资)FROM 职工表； HAVING COUNT(*)＞＝3
B．SELECT 部门号，COUNT(*)，SUM(工资)FROM 职工表； GROUP BY 部门号 HAVING COUNT(*)＞＝3
C．SELECT 部门号，COUNT(*)，SUM(工资)FROM 职工表； GROUP BY 部门号 SET COUNT(*)＞＝3
D．SELECT 部门号，COUNT(*)，SUM(工资)FROM 职工表； GROUP BY 部门号 WHERE COUNT(*)＞＝3