On Mon, Jan 5, 2009 at 12:32 PM, Me <chabg...@gmail.com> wrote: > > I have a table of data that I update with a file. I would like to > delete all data that does not get updated.
We've done stuff like this before. One pattern that we used was: 1) At the beginning of the import process, we'd set a unique value (like a timestamp/date) 2) We'd update an attribute in the table for all records with that value: example: last_import = 20081231 3) then run your import/update process.. 4) then delete any records that last_import != 20081231 voila! Robby -- Robby Russell Chief Evangelist, Partner PLANET ARGON, LLC design // development // hosting w/Ruby on Rails http://www.planetargon.com/ http://www.robbyonrails.com/ aim: planetargon +1 503 445 2457 +1 877 55 ARGON [toll free] +1 815 642 4068 [fax] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
