如何在 Oracle 中填充日历表?

How to populate calendar table in Oracle?(如何在 Oracle 中填充日历表?)

问题描述

我想在 Oracle DB 中维护一个日历表，我想用从 2011 年到 2013 年开始的一年中的所有日子(可能一直到任何一年)来填充它.我该怎么做?

I want to maintain a calender table in Oracle DB which I want to populate with all the days of the year starting from 2011 to 2013 (it may be till any year). How can I do that?

考虑我的数据库表有列，示例数据集是:

Consider my DB table has columns and example dataset is:

S.No  Cal_Dt      DayName 
1     01-01-2011  Monday
2     02-01-2011  Tuesday
3     03-01-2011  Wednesday

等等.

我只关心这里的 Cal_Dt(DayName 是可选的).

I am more concerned with the Cal_Dt only here (DayName is optional).

推荐答案

这是一个简单易行的方法

This is a simple and easy way to do it

with calendar as (
        select :startdate + rownum - 1 as day
        from dual
        connect by rownum < :enddate - :startdate
    )
select rownum as "S.No", to_date(day,'dd_mm_yyyy') as "Cal_Dt", to_char(day,'day') as "DayName"
from calendar

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