how to take id names present in some other table

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Hi,

I am displaying product names along with category id's and subcategory id's which are act as foreign key here...but i want to display id names which are present in category and subcategory table...already in one page i am displaying all category names and sub category names and storing their respective id's in product table...but in one page i need to display category and subcategory names which are not present in product table instead their id's are present here...please help me

Posted 16-May-12 1:45am

Aparnashreenivas

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Sandeep Mewara 16-May-12 8:38am

Not clear.

2 solutions

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Wendelius · Answer 1 · 2012-05-16T10:26:00

Solution 1

If I understood the question correctly, you can use NOT EXISTS for this. Something like:

SQL

SELECT * 
FROM Category c
WHERE NOT EXISTS( SELECT 1
                  FROM Product p
                  WHERE p.CategoryId = c.CategoryId);

Posted 16-May-12 10:26am

Wendelius

madhusudhan.k · Answer 2 · 2012-05-21T04:09:00

Solution 2

Not Exists or Not In, any one can be used.

Posted 21-May-12 4:09am

madhusudhan.k