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,COINT(*),SUM (工资) FROM 职工; GROUP BY仓库号WHERE COUNT(*)>=4