I have an old table of comments made to a web site in which no user registration was required, but commenters were required to enter an email address. The system had little verification and users could enter bogus addresses, but most people did enter their real email address.
The new system requires user registration and new comments are now tied directly to a user account. What I'd like to do is link any newly registered users to their old comments by using the email address. It's imperfect, but better than nothing. In the comments table below old comments have the name and email columns populated, while new comments have the userid populated instead. users ------------ userid int username varchar email varchar ... comments ------------ commentid int userid int name varchar email varchar comment varchar ... Is there a single SQL query that could set userid in the comments table based on linking the email address in the two tables? I can easily do it by looping over the users table and querying the comments table, but that's potentially a lot of queries. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:319779 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
