sql 统计查询某一字段的某一个值的总条数

查询某一字段的某一个值的总条数

比如：orderprogressno字段的值分别为1,2,3,4,那么就是查询值为1的总条数和值为2的总条数

select orderno,count(orderprogressno)from servicerepair
已阅读  = sum(case when orderprogressno =1 then 1 else 0 end)，
未阅读  = sum(case when orderprogressno =2 then 1 else 0 end)，
from servicerepair

select orderno ,
sum(case when orderprogressno =1 then 1 else 0 end)，as yiyuedu
sum(case when orderprogressno =1 then 1 else 0 end)，as weiyuedu
from servicerepair group by orderno

mybatis下代码：

<select id="selectCountBylevel" parameterType="java.util.Map" resultType="java.util.Map">
 	select count (case when orderprogressno =1 then 1 else null end) 已阅读,
			count (case when orderprogressno =2 then 1 else null end) 已联系,
			count (case when orderprogressno =3 then 1 else null end) 已预约,
			count (case when orderprogressno =4 then 1 else null end) 正在服务,
			count (case when orderprogressno =5 then 1 else null end) 已经完成,
			count (case when orderprogressno =6 then 1 else null end) 已经结束,
			count (case when orderprogressno =7 then 1 else null end ) 已经取消
			from servicerepair where deptno =#{deptno}
</select>