What is the best design for these data base tables?

Posted by Mohammed Jamal on Stack Overflow See other posts from Stack Overflow or by Mohammed Jamal
Published on 2011-01-09T04:34:18Z Indexed on 2011/01/09 4:54 UTC
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sql

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database-design

I need to find the best solution to make the DB Normalized with large amount of data expected.

My site has a Table Tags (contain key word,id) and also 4 types of data related to this tags table like(articles,resources,jobs,...).

The big question is:- for the relation with tags what best solution for optimazaion & query speed?

make a table for each relation like:
- table articlesToTags(ArticleID,TagID)
- table jobsToTags(jobid,tagid)
- etc.
or put it all in one table like
- table tagsrelation(tagid,itemid,itemtype)

I need your help. Please provide me with articles to help me in this design

consider that in future the site can conation new section relate to tag

Thanks

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