oracle实现按天，周，月，季度，年查询排序方法

oracle按天，周，月，季度，年查询排序

天--to_char(t.start_time,'YYYY-MM-DD')周 --to_char(t.start_time,'YYYY')，to_char(t.start_time,'IW')月度--to_char(t.start_time,'YYYY-MM')季度--to_char(t.start_time,'YYYY')，to_char(t.start_time,'Q')年度--to_char(t.start_time,'YYYY')

按天查询

select to_char(t.start_time,'YYYY-MM-DD') day ,count(*) from test t where to_char(t.start_time,'YYYY')='2019' --条件限制group by to_char(t.start_time,'YYYY-MM-DD') --分组order by to_char(t.start_time,'YYYY-MM-DD') --排序

按周查询

select to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'IW'),count(*) from test t where to_char(t.start_time,'YYYY')='2019' --条件限制group by to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'IW')--分组order by to_char(t.start_time,'YYYY') year,to_char(t.start_time,'IW') --排序

按月度查询

select to_char(t.start_time,'YYYY-MM') ,count(*) from test t where to_char(t.start_time,'YYYY')='2019' --条件限制group by to_char(t.start_time,'YYYY-MM') --分组order byto_char(t.start_time,'YYYY-MM') --排序

按季度查询

select to_char(t.start_time,'YYYY') year ,to_char(t.start_time,'Q'),count(*) from test t where to_char(t.start_time,'YYYY')='2019' --条件限制group by to_char(t.start_time,'YYYY') ,to_char(t.start_time,'Q')--分组order byto_char(t.start_time,'YYYY') ,to_char(t.start_time,'Q')--排序

按年度查询

select to_char(t.start_time,'YYYY') year ,count(*) from test t where to_char(t.start_time,'YYYY')='2019' --条件限制group by to_char(t.start_time,'YYYY') --分组order by to_char(t.start_time,'YYYY') --排序

知识点扩展：oracle 实现按天,周,月,季度,年查询统计数据

这里提供了一种方法，挺不错oracle 实现按周,月,季度,年查询统计数据 。

还在网上看到用trunc来搞也可以，下面是个例子，两句SQL效果一样的.

id有重复的，所以group by搞了两个字段.

只在Oracle数据库里试过，其它库没试过。

 create table CONSUMER_ACC  (  ID VARCHAR2(50) not null ,  ACC_NUM VARCHAR2(10),  DATETIME DATE  )  select t.id,trunc(t.datetime, 'mm' ) as d, sum (t.acc_num) as n  from CONSUMER_ACC t  --where  group by t.id,trunc(t.datetime, 'mm' )  order by n desc ;  select t.id,to_char(t.datetime, 'mm' ) d , sum (t.acc_num) n  from CONSUMER_ACC t  --where  group by t.id,to_char(t.datetime, 'mm' )  order by n desc ------------------------------------------------------------------------------//按天统计  select count(dataid) as 每天操作数量, sum() from where group by trunc(createtime, 'DD')) //按自然周统计  select to_char(date,'iw'),sum()  from  where  group by to_char(date,'iw')  //按自然月统计  select to_char(date,'mm'),sum()  from  where  group by to_char(date,'mm')  //按季统计  select to_char(date,'q'),sum()  from  where  group by to_char(date,'q')  //按年统计  select to_char(date,'yyyy'),sum()  from  where  group by to_char(date,'yyyy') 

总结

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