Oracle百分比分析函数RATIO_TO_REPORT() OVER()实例详解

有时候不用的指标的绝对值不能比，但是转转为百分比的形式就容易看出波动了，是数据分析的好用的一个分析函数

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>

总结

以上所述是小编给大家介绍的oracle百分比分析函数ratio_to_report() over(),希望对大家有所帮助