Comments on: Tags: Database schemas

By: turd

turd — Wed, 07 Oct 2009 23:32:55 +0000

this is very helpful - concise and well written.

THANKS!

By: Tozetre

Tozetre — Wed, 30 Sep 2009 17:49:51 +0000

I was checking Google to see if there were any better solutions than an intersection table (Toxi), and found this. Good article, if not precisely what I was looking for.

One thing I did notice that you might care about is your disadvantage for Toxi’s schema;
“When altering or deleting bookmarks you can end up with tag-orphans.”
This isn’t the case if you use foreign keys (which Phillip Keller implements above), and if you add ON DELETE CASCADE to your reference clause any deletion of tags or items will also delete references to it in the intersection table- for better or worse.

By: Marwan

Marwan — Sun, 27 Sep 2009 17:13:53 +0000

You have help me build this site! http://www.TagThis.com thanks for the article! TagThis is a tag based search and suggestion engine that gives you tailor made results. it is still in its infancy. would greatly appreciate any feedback if you have time to check it out! cheers

By: Nick Gilbert

Nick Gilbert — Fri, 25 Sep 2009 09:52:36 +0000

In the “toxi” solution, why is there an ID column on the “tagmap” table? I don’t really see why that’s needed - or am I missing something?

By: Hua Chen

Hua Chen — Sun, 23 Aug 2009 11:55:50 +0000

Thank you very much, your article helped me a lot!

By: syssyphus

syssyphus — Mon, 18 May 2009 15:13:48 +0000

here is another idea.

one table, 2 columns

Then make a 2 column primary key (to disallow duplicates)

so…. select * from tag_table

URL | TAG
http://www.wikipedia.org | encyclopedia
http://www.wikipedia.org | reference
http://www.wikipedia.org | awesome

but how do I right the queries (intersection, etc)

thanks

By: Apollia

Apollia — Fri, 06 Mar 2009 23:41:49 +0000

Thanks for your very interesting and useful blog posts, Philipp. This one in particular was of great help to me in figuring out how to make a tag system, which I’ve been using in multiple projects. My tag system was based on the “Toxi” solution.

I recently released my own free, open source, public domain web links organizer program - Astroblahhh Links Organizer, a component of my incomplete software package Astroblahhh Desktop:

http://astroblahhh.com/software/abdesktop

I would welcome any feedback if you’re ever in the mood to try it out.

Quote by sai:
“how to store facets or faceted data in a database with example can any body try and provide?”

I’m not sure exactly what faceted data is, but, judging by the Wikipedia article on faceted search, the concept kind of reminds me of Astroblahhh Desktop a bit, because of its filtering capabilities. Maybe my program will be of interest to you.

By: sai

sai — Thu, 05 Mar 2009 11:18:29 +0000

how to store facets or faceted data in a database with example can any body try and provide?

By: Marco

Marco — Sat, 10 Jan 2009 02:23:54 +0000

thanks, this article help me to clarify the things.

By: Joao

Joao — Wed, 05 Nov 2008 17:12:32 +0000

Thank you for your time! Your article helped me to quickly create what I wanted.

All the best!