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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对w3xue网站的支持！
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