Re: Normalization sql

[John Chang]

What is the Title.ID and Actor.ID?

Will this work if someone is doing a text search on a webpage? The results will go to another page. Does the below go to the first page or the results page? Thank you.

At 12:20 PM 10/16/2002 -0400, you wrote:

John Chang wrote:

Studios (StudioName, StudioID)
Genres (GenreName, GenreID)
Titles (VideoTitle, Details, StudioID, GenreID, BitRateID, TitleID)
Actors (F_Name, L_Name, ActorID)
Stars (TitleID, ActorID)

TitleGenres (TitleID, GenreID)

So, if I just use theses tables I will be OK if the video has multiple titles, multiple actors, & multiple genres?

How do I create a junction table? Example, between Genres and Titles, how do I add the to PK fields to TitleGenres? Do I just create the TitleGenres table and add the TitleID & GenreID field and does the database know they are linked?

Sort of; assuming you create a junction table called "TitleActors" with TitleID, ActorID, and you want the movies with "Stalone" as the actor them, you might do a query like:

select * from Titles
LEFT JOIN TitleActors ON Title.ID = TitleID
LEFT JOIN Actors ON ActorID = Actors.ID
WHERE Actors.L_Name = "Stalone";

--
Michael T. Babcock
C.T.O., FibreSpeed Ltd.
http://www.fibrespeed.net/~mbabcock



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