tagging

How to implement tag system

I believe you’ll find interesting this blog post: Tags: Database schemas The Problem: You want to have a database schema where you can tag a bookmark (or a blog post or whatever) with as many tags as you want. Later then, you want to run queries to constrain the bookmarks to a union or intersection … Read more

What is the most efficient way to store tags in a database?

One item is going to have many tags. And one tag will belong to many items. This implies to me that you’ll quite possibly need an intermediary table to overcome the many-to-many obstacle. Something like: Table: Items Columns: Item_ID, Item_Title, Content Table: Tags Columns: Tag_ID, Tag_Title Table: Items_Tags Columns: Item_ID, Tag_ID It might be that … Read more

Database Design for Tagging [closed]

Here’s a good article on tagging Database schemas: http://howto.philippkeller.com/2005/04/24/Tags-Database-schemas/ along with performance tests: http://howto.philippkeller.com/2005/06/19/Tagsystems-performance-tests/ Note that the conclusions there are very specific to MySQL, which (at least in 2005 at the time that was written) had very poor full text indexing characteristics.