求至少有4个职工的每个仓库的工资总和( )。
A.SELECT 仓库号,COUNT(*),SUM(工资) FROM 职工
WHERE COUNT(*)>=4
B.SELECT 仓库号,COUNT(*),SUM(工资) FROM 职工
GROUP BY 仓库号 SET COUNT(*)>=4
C.SELECT 仓库号,COUNT(*),SUM(工资) FROM 职工
GROUP BY 仓库号 HAVING COUNT(*)>=4
D.SELECT 仓库号,COUNT(*),SUM(工资) FROM 职工
GROUP BY 仓库号 WHERE COUNT(*)>=4