sql 某列当中相同的类型累加

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_record
GROUP BY DATE(create_time)