我要评论一.获取当年所有日期
--select * from (
select trunc(sysdate,'yyyy')+rownum-1 as pdays
from dual connect by rownum<=add_months(trunc(sysdate,'yyyy'),12)-trunc(sysdate,'yyyy')
--)where pdays<trunc(sysdate)/*如此可查询从当年1号到昨天的日期*/
--去年所有日期
select add_months(trunc(sysdate,'yy'),-12)+rownum-1 as pdays
from dual connect by rownum<=trunc(sysdate,'yyyy')-add_months(trunc(sysdate,'yy'),-12)
--明年所有日期
select add_months(trunc(sysdate,'yy'),12)+rownum-1 as pdays
from dual connect by rownum<=add_months(trunc(sysdate,'yy'),24)-add_months(trunc(sysdate,'yy'),12)
--前年，去年，今年的所有日期
select add_months(trunc(sysdate,'yy'),-24)+rownum-1 as pdays
from dual connect by rownum<=add_months(trunc(sysdate,'yy'),12)-add_months(trunc(sysdate,'yy'),-24)
--用年份来获取一年
-- 把2023替换为用户传过来的数值
where pdays>=trunc(to_date('2023/01/01','yyyy/mm/dd','yy')
and pdays<add_months(to_date('2023/01/01','yyyy/mm/dd',12)
自定义
--前年，去年，今年、明年的所有日期 select add_months(trunc(sysdate,'yy'),-24)+rownum-1 as pdays from dual connect by rownum<=add_months(trunc(sysdate,'yy'),24)-add_months(trunc(sysdate,'yy'),-24) --自定义讲解 select add_months(trunc(sysdate,'yy'),-24)/*开始日期*/+rownum-1 as pdays from dual connect by rownum<=add_months(trunc(sysdate,'yy'),12)/*结束日期*/-add_months(trunc(sysdate,'yy'),-24)/*开始日期*/
二.获取当月所有日期
select trunc(sysdate,'mm')+rownum-1 as pdays from dual connect by rownum<=to_number(trunc(to_char(last_day(sysdate),'dd')))
三.获取当年所有月份
select to_char(pday,'mm')pdays from (select trunc(sysdate,'yyyy')+rownum-1 as pday from dual connect by rownum<=add_months(trunc(sysdate,'yyyy'),12/*替换此数可动态调整查询的月份*/)-trunc(sysdate,'yyyy')) group by to_char(pday,'mm')order by pdays
四.当月一号到昨天日期
select * from (select to_char(sysdate-rownum+1,'yyyy/mm/dd') pdays from dual connect by rownum<=31) where pdays between (select to_char(trunc(sysdate,'mm'),'yyyy/mm/dd') from dual) and to_char(trunc(sysdate)-1,'yyyy/mm/dd') order by pdays
五.今年月份&天数
select to_char(pday,'yyyy/mm')as pmonth,sum(num)num from (select 1 num,trunc(sysdate,'yyyy')+rownum-1 as pday from dual connect by rownum<=add_months(trunc(sysdate,'yyyy'),12)-trunc(sysdate,'yyyy')) --where pday<trunc(sysdate,'mm') /*此处可限制具体月份*/ group by to_char(pday,'yyyy/mm') order by to_char(pday,'yyyy/mm')
六.某月天数
select add_months(to_date(to_char(sysdate/*可替换为想要查询的月份*/,'yyyy/mm'),'yyyy/mm'),1) -to_date(to_char(sysdate/*可替换为想要查询的月份,于前参数一致*/,'yyyy/mm'),'yyyy/mm')m_num from dual
七.当年天数
select add_months(trunc(sysdate,'yyyy'),12)-trunc(sysdate,'yyyy') y_num from dual
八.当月天数
select to_number(to_char(last_day(trunc(sysdate)),'dd'))m_num from dual
九.当年周数
select pw from(select to_char(pdays,'iyyy-iw')pw from(select trunc(sysdate,'yyyy')+rownum-1 as pdays from dual connect by rownum<=add_months(trunc(sysdate,'yyyy'),12)-trunc(sysdate,'yyyy')))group by pw order by pw
十.当前第几周，某个日期为第几周
select to_char(sysdate,'iyyy-iw')as pw from dual
select to_char(date '2026-08-20','iyyy-iw')as pw from dual
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持代码网。
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