交叉查询的sql-数据库专栏,SQL Server

sql：
select gwlb， count(case when (year(getdate())-year(rybirthday)) between 20 and 30 then rygh end) as 20-30,
 count(case when (year(getdate())-year(rybirthday)) between 30 and 40 then rygh end) as 30-40,
 count(case when (year(getdate())-year(rybirthday)) between 40 and 50 then rygh end) as 40-50,
 count(case when (year(getdate())-year(rybirthday)) between 50 and 60 then rygh end) as 50-60,
 count(case when (year(getdate())-year(rybirthday)) between 60 and 70 then rygh end) as 60-70
from t_ry
group by gwlb