本文通過實例代碼給大家介紹了oracle百分比分析函數RATIO_TO_REPORT() OVER(),代碼簡單易懂，非常不錯，具有一定的參考借鑑價值，需要的朋友可以參考下
有時候不用的指標的絕對值不能比，但是轉轉爲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 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','英語',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>
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，小編會及時回覆大家的。在此也非常感謝大家對神馬文庫網站的支持！
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