20:00:24 SYS@orcl> conn scott/tiger;
Connected.
20:00:30 SCOTT@orcl> create table test
20:01:22   2   (
20:01:22   3   name varchar(20),
20:01:22   4   kemu varchar(20),
20:01:22   5   score number
20:01:22   6   );
 
Table created.
 
Elapsed: 00:00:00.04
20:01:23 SCOTT@orcl> insert into test values('testa','yuwen',10);
 
1 row created.
 
Elapsed: 00:00:00.02
20:01:35 SCOTT@orcl>  insert into test values('testa','英语',100);
 
1 row created.
 
Elapsed: 00:00:00.00
20:01:35 SCOTT@orcl>  insert into test values('testb','yuwen',60);
 
1 row created.
 
Elapsed: 00:00:00.01
20:01:36 SCOTT@orcl>  insert into test values('testb','yuwen',120);
 
1 row created.
 
Elapsed: 00:00:00.00
20:01:36 SCOTT@orcl>  insert into test values('testc','yuwen',40);
 
1 row created.
 
Elapsed: 00:00:00.00
20:01:37 SCOTT@orcl> commit;
 
Commit complete.
 
Elapsed: 00:00:00.00
20:01:42 SCOTT@orcl> select name,
20:03:32   2    score,
20:03:32   3     ratio_to_report(score) over() as  ratio1,
20:03:32   4    ratio_to_report(score) over(partition by kemu) as  ratio2
20:03:32   5   from test ;
 
NAME                      SCORE     RATIO1     RATIO2
-------------------- ---------- ---------- ----------
testa                        10  .03030303 .043478261
testb                        60 .181818182 .260869565
testc                        40 .121212121 .173913043
testb                       120 .363636364  .52173913
testa                       100 .303030303          1
 
Elapsed: 00:00:00.00
20:03:33 SCOTT@orcl>