title: Is it possible to partially refresh a materialized view in Oracle?
body: <p>I have a very complex Oracle view based on other materialized views, regular views as well as some tables (I can't "fast refresh" it). Most of the time, existing records in this view are based on a date and are "stable", with new record sets having new dates. </p>
  
  <p>Occasionally, I receive back-dates. I know what those are and how to deal with them if I were maintaining a table, but I would like to keep this a "view". A complete refresh would take around 30 minutes, but it only takes 25 seconds for any given date.</p>
  
  <p>Can I specify that only a portion of a materialized view should be updated (i.e. the affected dates)? </p>
  
  <p>Do I have to scrap the view and use a table and a procedure to populate or refresh a given date in that table?</p>