在Oracle表中填充将来的日期

Question

I have attached tables, product and date. Lets say my product table has data till yesterday ie 05/31/2018 am trying to populate season table where I could do the calculation till 5/31/2018 where value = (value on same day last year/previous day last year) with Ch(a) and P(pen), however the data set was till 5/31/2018. my aim is to get data/calculation for 06/1/2018 till 12/31/2018 as well. how do i get the data for these future dates as I have the data to calculate these future dates in prod table.

appreciate if you can help. Thank you!

Answer 1

You can generate a series of dates using CONNECT BY subquery like this one:

SELECT Start_date + level - 1 as my_date
FROM (
  SELECT date '2018-01-01' as Start_date FROM dual 
)
CONNECT BY Start_date + level - 1 <= date '2018-01-05'

Demo: http://www.sqlfiddle.com/#!4/072359/1

|              MY_DATE |
|----------------------|
| 2018-01-01T00:00:00Z |
| 2018-01-02T00:00:00Z |
| 2018-01-03T00:00:00Z |
| 2018-01-04T00:00:00Z |
| 2018-01-05T00:00:00Z |