Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

Professional Opinions
Ask a Question
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

troubleshooting Question

MSSQL Joins - how to join 3 tables and return all rows even if null

Avatar of Jamie
JamieFlag for United Kingdom of Great Britain and Northern Ireland asked on
Microsoft SQL ServerASP
11 Comments1 Solution543 ViewsLast Modified:
Hi All,

I'm getting in a right muddle trying to work this out, hence my need for your help.

I have 3 tables:

1. Products ~ List of products
2. Categories ~ List of category names
3. ProCategories ~ List of products (1) in which category (2) - this holds only id numbers.

I need t-sql script, which will be used via asp to list all products and the categories they are in - and also the categories they are not in - including the category name, which can only be obtained from table 2. I want to be able to filter by product name also.

My feeble effort so far;

select p.cname, c.catdescription  from products as p,categories as c, prodcategories as pc
where pc.intcatalogid = p.catalogid
and   pc.intcategoryid = c.categoryid
and p.cname like '%yellow%'

Looking for something like

Product         Category       ProdCategory
Apple            Fruit               Exists
Apple            Green            Exists
Apple            Vegetable     NULL                

Many thanks


Avatar of Shaun Kline
Shaun KlineFlag of United States of America imageLead Software Engineer

Our community of experts have been thoroughly vetted for their expertise and industry experience.

This problem has been solved!
Unlock 1 Answer and 11 Comments.
See Answers