Question

I want all records that are within the allowed dates.

SELECT
  page_id, page_published_date, page_expired 
FROM 
  pages
WHERE
  ([page_published_date] <= getdate() OR [page_published_date] is null)
  AND
  ([csp_expired] <= getdate() OR [page_expired] is null)

Mind that dates can contain null values.

Example table:

page_id, page_published_date, page_expired
1        2012-10-05           null
2        null                 2012-10-01
3        2012-08-01           2012-11-30

In this case the correct record would be 3.

Answer 1

Edited answer, based on choosing #3 as the only result

SELECT
  page_id, page_published_date, page_expired 
FROM 
  pages
WHERE
  -- Publication date BEFORE today (current time)
  ([page_published_date] <= getdate() OR [page_published_date] is null)
  AND
  -- and page has not expired
  (datediff(d,0,getdate()) < [page_expired] OR [page_expired] is null)

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Direct translation from subject line

SELECT
  page_id, page_published_date, page_expired 
FROM 
  pages
WHERE
  -- Publication date greater than today
  ([page_published_date] > DateDiff(D,0,getdate()) OR [page_published_date] is null)
  AND
  -- and [Publication date?] less than the expiration date
  ([page_published_date] < [page_expired] OR [page_expired] is null)

Notes:

1. DateDiff(D,0,getdate()) gives you “today”, i.e. without the time portion
2. I have a feeling you don’t want to compare [page_expired] against today, since today pre-dates the [page_published_date] given the first condition
3. Use my pattern of translation to plug in any changes as required, if my interpretation is wrong