sql 某列中间相同的类型累加

select Sum(case when buy_status =1 then 1 else 0 end) '订购',			 Sum(case when buy_status =2 then 1 else 0 end) '退订',Sum(case when buy_status =6 then 1 else 0 end) '续订'	from business_recordGROUP BY DATE(create_time)