Oracle資料庫按時間進行分組統計資料的方法_oracle

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上載者:User

Oracle按不同時間分組統計的sql
如下表table1:

日期(exportDate)        數量(amount) --------------          ----------- 14-2月 -08            20 10-3月 -08            2 14-4月 -08            6 14-6月 -08            75 24-10月-09           23 14-11月-09           45 04-8月 -10            5 04-9月 -10            44 04-10月-10           88 

注意:為了顯示更直觀,如下查詢已皆按相應分組排序

1.按年份分組

select to_char(exportDate,'yyyy'),sum(amount) from table1 group by to_char(exportDate,'yyyy'); 
年份   數量 ----------------------------- 2009  68 2010  137 2008  103 

2.按月份分組

select to_char(exportDate,'yyyy-mm'),sum(amount) from table1 group by to_char(exportDate,'yyyy-mm')order by to_char(exportDate,'yyyy-mm'); 
月份      數量 ----------------------------- 2008-02  20 2008-03  2 2008-04  6 2008-06  75 2009-10  23 2009-11  45 2010-08  5 2010-09  44 2010-10  88 

3.按季度分組

select to_char(exportDate,'yyyy-Q'),sum(amount) from table1 group by to_char(exportDate,'yyyy-Q') order by to_char(exportDate,'yyyy-Q'); 
季度     數量 ------------------------------ 2008-1  22 2008-2  81 2009-4  68 2010-3  49 2010-4  88 

4.按周分組

select to_char(exportDate,'yyyy-IW'),sum(amount) from table1 group by to_char(exportDate,'yyyy-IW')order by to_char(exportDate,'yyyy-IW'); 
周       數量 ------------------------------ 2008-07  20 2008-11  2 2008-16  6 2008-24  75 2009-43  23 2009-46  45 2010-31  5 2010-35  44 2010-40  88


PS:Oracle按時間段分組統計
想要按時間段分組查詢,首先要瞭解level,connect by,oracle時間的加減.
關於level這裡不多說,我唯寫出一個查詢語句:

----level 是一個偽例  select level from dual connect by level <=10  ---結果:1   2 3 4 5 6 7 8 9 10 

oracle時間的加減看看試一下以下sql語句就會知道:

select sysdate -1 from dual ----結果減一天,也就24小時 select sysdate-(1/2) from dual -----結果減去半天,也就12小時 select sysdate-(1/24) from dual -----結果減去1 小時 select sysdate-((1/24)/12) from dual  ----結果減去5分鐘 select sydate-(level-1) from dual connect by level<=10 ---結果是10間隔1天的時間

下面是本次例子:

select dt, count(satisfy_degree) as num from T_DEMO i , (select sysdate - (level-1) * 2 dt from dual connect by level <= 10) d where i.satisfy_degree='satisfy_1' and i.insert_time<dt and i.insert_time> d.dt-2 group by d.dt  

 

例子中的sysdate - (level-1) * 2得到的是一個間隔是2天的時間
group by d.dt  也就是兩天的時間間隔分組查詢

自己實現例子:

create table A_HY_LOCATE1( MOBILE_NO     VARCHAR2(32), LOCATE_TYPE    NUMBER(4), AREA_NO      VARCHAR2(32), CREATED_TIME    DATE, AREA_NAME     VARCHAR2(512),);

select (sysdate-13)-(level-1)/4 from dual connect by level<=34  --從第一條時間記錄開始(sysdate-13)為表中的最早的日期,“34”出現的分組數(一天按每六個小時分組 就應該為4)

一下是按照每6個小時分組  

select mobile_no,area_name,max(created_time ),dt, count(*) as num from a_hy_locate1 i ,(select (sysdate-13)-(level-1)/4 dtfrom dual connect by level <= 34) dwhere i.locate_type = 1 andi.created_time<dt and i.created_time> d.dt-1/4group by mobile_no,area_name,d.dt

 
另外一個方法:

--按六小時分組select trunc(to_number(to_char(created_time, 'hh24')) / 6),count(*) from t_test where created_time > trunc(sysdate - 40) group by trunc(to_number(to_char(created_time, 'hh24')) / 6)--按12小時分組select trunc(to_number(to_char(created_time, 'hh24')) / 6),count(*) from t_test where created_time > trunc(sysdate - 40) group by trunc(to_number(to_char(created_time, 'hh24')) / 6)

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