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
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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>
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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服务器之家网站的支持!
如果你觉得本文对你有帮助,欢迎转载,烦请注明出处,谢谢!
原文链接:https://www.cnblogs.com/yongestcat/archive/2019/08/30/11433451.html