sql 统计本周，本月，下周，下月sql语句
/*
表结构
student(s#,sname,sage,ssex) --s# 学生编号,sname 学生姓名,sage 出生年月,ssex 学生性别保存一些数据
insert into student values('01' , n'wwww.111cn.net' , '1990-01-01' , n'男')
insert into student values('02' , n'钱电' , '1990-12-21' , n'男')
insert into student values('03' , n'孙风' , '1990-05-20' , n'男')
insert into student values('04' , n'李云' , '1990-08-06' , n'男')
insert into student values('05' , n'周梅' , '1991-12-01' , n'女')
查询本周数据sql语句
select * from student where datediff(week,datename(yy,getdate()) + right(convert(varchar(10),sage,120),6),getdate()) = 0--48、查询下周数据sql语句
select * from student where datediff(week,datename(yy,getdate()) + right(convert(varchar(10),sage,120),6),getdate()) = -1--49、查询本月数据sql语句
select * from student where datediff(mm,datename(yy,getdate()) + right(convert(varchar(10),sage,120),6),getdate()) = 0--50、查询下月数据sql语句
select * from student where datediff(mm,datename(yy,getdate()) + right(convert(varchar(10),sage,120),6),getdate()) = -1
drop table student,course,teacher,sc
*/
//本款sql 语句可以查询，本周，本月，下周，下月生日的相关数据