有時候不用的指標的絕對值不能比，但是轉轉為百分比的形式就容易看出波動了，是數據分析的好用的一個分析函數
20:00:24 SYS@orcl> conn scott/tiger;Connected.20:00:30 SCOTT@orcl> create table test20:01:22 2 (20:01:22 3 name varchar(20),20:01:22 4 kemu varchar(20),20:01:22 5 score number20:01:22 6 );Table created.Elapsed: 00:00:00.0420:01:23 SCOTT@orcl> insert into test values('testa','yuwen',10);1 row created.Elapsed: 00:00:00.0220:01:35 SCOTT@orcl> insert into test values('testa','英語',100);1 row created.Elapsed: 00:00:00.0020:01:35 SCOTT@orcl> insert into test values('testb','yuwen',60);1 row created.Elapsed: 00:00:00.0120:01:36 SCOTT@orcl> insert into test values('testb','yuwen',120);1 row created.Elapsed: 00:00:00.0020:01:36 SCOTT@orcl> insert into test values('testc','yuwen',40);1 row created.Elapsed: 00:00:00.0020:01:37 SCOTT@orcl> commit;Commit complete.Elapsed: 00:00:00.0020:01:42 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 ratio220:03:32 5 from test ;NAME SCORE RATIO1 RATIO2-------------------- ---------- ---------- ----------testa 10 .03030303 .043478261testb 60 .181818182 .260869565testc 40 .121212121 .173913043testb 120 .363636364 .52173913testa 100 .303030303 1Elapsed: 00:00:00.0020:03:33 SCOTT@orcl>總結
以上所述是小編給大家介紹的Oracle百分比分析函數RATIO_TO_REPORT() OVER(),希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！
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