I&#039;m trying to build a clone to http://www.craigslist.com<BR><BR>I can&#039;t figure out the database design.<BR>looking at the categories i need a table for "Community", "Housing", "jobs" etc, and inside each table i need to list the category for example "Activity partners" and "Artists/Musicians" in the Community table.<BR><BR>I&#039;m fine with that but I need to go 1 step further and list the individual threads inside the Activity partners row...I have NO clue how to do this.<BR><BR>any ideas/tutorials on this?<BR><BR>please help<BR><BR>thanks!