Using A Match Table To Store Multiple Columns For Parent Data

Mar 1, 2008

Sorry for the confusing subject. Here's what im doing:

I have a table of products. Products have N categories and
subcategories. Right now its 4. But there could be more down the
line so it needs to be extensible.

So ive created a product table. Then a category table that has many
categories of products, of which a product can belong to N number of
these categories. Finally a ProductCategory "match" table.

This is pretty straigth forward. But im getting confused as to how to
write views/sprocs to pull out rows of products that list all the
products categories as columns in a single query view.

For example:

lets say productId 1 is Cap'n Crunch cereal. It is in 3 categories:
Cereal, Food for Kids, Crunchy food, and Boxed.

So we have:

Product
----------------
1 Capn Crunch

Categories
-----------------
1 Cereal
2 Food for Kids
3 Crunchy food
4 Boxed

ProductCategories
------------------
1 1
1 2
1 3
1 4

How do I go about writing a query that returns a single result set for
a view or data set (for use in a GridView control) where I would have
the following result:

Product results
---------------------------------
ProductId ProductName Category 1 Category 2
Category 3 Category N ...
------------------------------------------------------------------------
1 Capn Crunch Cereal Food for Kids Crunchy food
Boxed


Am I just thinking about this all wrong? Sure seems like it.

Cheers,

Will

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