rank() partition by 排名次

Posted 2020-11-04 温碧泉

rank()排名

partition by分组与group by相比各有优势，在这里就省略100字。。。。

以下为案例：

create table student -- 学生表
(
sid integer primary key,-- ID
sname nvarchar2(100),-- 姓名
sex nvarchar2(50),-- 性别
age integer,-- 年龄
address nvarchar2(200) -- 住址
);
insert into student values(8001,\'张三\',\'男\',20,\'湖北武汉\');
insert into student values(8002,\'李四\',\'女\',21,\'湖北襄阳\');
insert into student values(8003,\'王五\',\'女\',21,\'湖北襄阳\');
insert into student values(8004,\'赵六\',\'男\',22,\'湖北襄阳\');
insert into student values(8005,\'孙琦\',\'女\',19,\'湖北襄阳\');
insert into student values(8006,\'克鲁斯\',\'女\',19,\'湖北襄阳\');
insert into student values(8007,\'丝路币\',\'男\',19,\'湖北襄阳\');
insert into student values(8008,\'史酷比\',\'男\',23,\'湖北襄阳\');
insert into student values(8009,\'库哈斯\',\'男\',20,\'湖北襄阳\');
insert into student values(8010,\'罗欧克\',\'女\',19,\'湖北襄阳\');

create table workinfo
(
wid integer primary key,
sid integer ,
CONSTRAINT sid foreign key(sid) references student(sid),
city nvarchar2(100),-- 就业城市
wage number(10,2),-- 月薪
workdate date,-- 就业时间
eid integer ,
CONSTRAINT eid foreign key(eid) references Emp(eid)-- 介绍人
);

insert into workinfo values(1001,8001,\'上海\',5000,to_date(\'2009-3-5\',\'yyyy-MM-dd\'),6005);
insert into workinfo values(1002,8002,\'上海\',4500,to_date(\'2010-3-5\',\'yyyy-MM-dd\'),6005);
insert into workinfo values(1003,8005,\'上海\',5500,to_date(\'2009-3-5\',\'yyyy-MM-dd\'),6005);
insert into workinfo values(1004,8003,\'杭州\',4000,to_date(\'2009-12-5\',\'yyyy-MM-dd\'),6006);
insert into workinfo values(1005,8004,\'杭州\',4500,to_date(\'2007-12-5\',\'yyyy-MM-dd\'),6006);
insert into workinfo values(1006,8006,\'南京\',4000,to_date(\'2009-12-5\',\'yyyy-MM-dd\'),6006);
insert into workinfo values(1007,8008,\'杭州\',4000,to_date(\'2009-12-5\',\'yyyy-MM-dd\'),6006);
insert into workinfo values(1008,8010,\'上海\',4000,to_date(\'2007-12-5\',\'yyyy-MM-dd\'),6007);
insert into workinfo values(1009,8007,\'杭州\',4400,to_date(\'2008-12-5\',\'yyyy-MM-dd\'),6007);
insert into workinfo values(1010,8009,\'杭州\',4000,to_date(\'2009-12-5\',\'yyyy-MM-dd\'),6007);

 

select RANK() OVER(PARTITION BY city ORDER BY wage DESC) 名次,city ,wage,s.sid,sname,sex
from student s,workinfo w
where w.sid=s.sid

 

 

效果如下图：