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Editorial Team
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Asked: 2026-05-17T00:18:26+00:00

I’m trying to write code to pull a list of product items from a

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I’m trying to write code to pull a list of product items from a SQL Server database an display the results on a webpage.

A requirement of the project is that a list of categories is displayed at the right hand side of the page as a list of checkboxes (all categories selected by default) and a user can uncheck categories and re-query the database to view products’s in only the categories they want.

Heres where it starts to get a bit hairy.

Each product can be assinged to multiple categories using a product categories table as below…

Product table
[product_id](PK),[product_name],[product_price],[isEnabled],etc...

Category table
[CategoryID](PK),[CategoryName]

ProductCagetory table

[id](PK),[CategoryID](FK),[ProductID](FK)

I need to select a list of products that match a set of category ID’s passed to my stored procedure where the products have multiple assigned categories.

The categort id’s are passed to the proc as a comma delimited varchar i.e. ( 3,5,8,12 )

The SQL breaks this varchar value into a resultset in a temp table for processing.

How would I go aout writing this query?

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1 Answer

  1. Editorial Team

    This should be fairly close to what you are looking for

    SELECT product.*
FROM   product
JOIN   ProductCategory ON ProductCategory.ProductID = Product.product_id
JOIN   #my_temp ON #my_temp.category_id = ProductCategory.CategoryID

    EDIT

    As noted in the comments this will produce duplicates for those products appearing in multiple categories. To correct this then specify DISTINCT before the column list. I have included all product columns in the list product.* as I do not know which columns you are looking for but you should probably change that to the specific columns that you want

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