Academic, really, with Oracle 9i. (Which is what we're using at the day job.)
If 7 is the categoryid for "Hockey": select categoryid, category, level from catalog start with categoryid=7 connect by parentid = prior categoryid level is a pseudo-column indicates the level of the tree, starting with 1. Throw in SYS_CONNECT_BY_PATH(category,'|') into the SELECT clause and you can display the whole chain as well. On 5/9/05, Kazmierczak, Kevin <[EMAIL PROTECTED]> wrote: > How does everyone handle an N level parent-child type relationship > within the same table? > > Say you have the following table setup for Categories > > categoryid > > category > > parentid > > You could have any level of categories each with the parent pointing up > the path. The problem I'm interested in is how to retrieve data out of > that setup. Right now I am using a UDF that opens cursors up and scans > the path to match records but that is killing the execution time as > traffic builds up on the site. > > Example: > > Category Path: Sports -> Hockey -> Teams -> Buffalo Sabres > > You want to find anything that is a member of the hockey category and > any sub category within. > > One option I am considering is to write out the entire path or write out > all the categories in a table or something that would make retrieval > faster, but would make an administrative nightmare. > > What do you recommend? > > Thanks. > > ----------------------------------------------- > Kevin Kazmierczak > Senior Software Developer > Citynet > 113 Platinum Drive > Bridgeport, WV 26330 > Phone: 304.848.5451 > http://www.citynet.net > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:206102 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
