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
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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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