Oh yeah, forgot to mention that. Yes, one event will have multiple categories. And one category can be applicable to multiple events.
On Tue, Mar 1, 2011 at 8:33 PM, Dhaval Jaiswal < jaiswal.dha...@enzenglobal.com> wrote: > > Just curious as it is not mentioned. Can Category ID also have multiple > event id ? > > > -- > Cheers > Dhaval Jaiswal > > > On 01/03/2011 5:53 PM, Wagyu Beef wrote: > >> Hey guys, >> >> Am a newbie here and need a little help. >> >> Part of the database consists of two tables "events" and "categories" >> which >> look like this >> >> +-------------------+-------------------------+ >> | eventID | eventName | >> +-------------------+-------------------------+ >> | 1 | Event A | >> | 2 | Event B | >> | 3 | Event C | >> +-------------------+-------------------------+ >> Primary Key: eventID >> >> +-------------------+-------------------------+ >> | categoryID | categoryName | >> +-------------------+-------------------------+ >> | 1 | Category A | >> | 2 | Category B | >> | 3 | Category C | >> +-------------------+-------------------------+ >> >> Primary Key: categoryID >> >> >> The idea is that an event may have multiple categories and from what I've >> read here (http://lists.mysql.com/mysql/171645), many-to-many >> relationships >> in the database should be avoid. According to the link and a couple of >> others I found, I'm supposed to create a separate "events_categories" >> table >> and make linkages using a Foreign Key. Am not sure how to translate this >> to >> a SQL query. Can I get some help. >> >> Thanks a million! >> >> Regards, >> Suren >> >> >> > <font Face='Arial' style='font-size:9pt'>This e-mail, and any attachments > are strictly confidential and may also contain legally privileged > information. It is intended for the addressee(s) only. If you are not the > intended recipient, please do not print, copy, store or act in reliance on > the e-mail or any of its attachments. Instead, please notify the sender > immediately and then delete the e-mail and any attachments. > > Unless expressly stated to the contrary, the views expressed in this e-mail > are not necessarily the views of Enzen Global Solutions (P) Limited or any > of its subsidiaries or affiliates (Group Companies), and the Group > Companies, their directors, officers and employees makes no representation > and accept no liability for the accuracy or completeness of this e-mail. You > are responsible for maintaining your own virus protection and the Group > Companies do not accept any liability for viruses. Enzen reserves the right > to monitor and review the content of all messages sent to or from this > e-mail address. Messages sent to or from this e-mail address may be stored > on the Enzen e-mail system.</font> >
