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T-SQL How to look for part of a datafield in a subquery

Posted on 2008-10-26
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Last Modified: 2010-04-21
I have a question regarding how to build a t-sql query.

I want to get a list of Products that is part of a given brand.

The problem is that I have two tables named 'Products' and 'Brands'. The Products table contain among others the fields 'Name' and 'BrandId'. The Brand table has the fields 'BrandId', 'BrandName', 'LanguageID'. The last field is there because the brands are written in four different languages.
Now for some reson the BrandId foreign key has never been implemented, so all the BrandId fields are 0. However the Products.Name field often will have the Brand name in the text, like "Ralph Lauren Glamourous Daylight Eau De Toilette Spray 50ml/1.7oz".

It's no big deal to search for a given brand name, like:
SELECT * FROM [Product] as P
where P.Name like '%Hugo Boss%'

But I was thinking if there was a way to build a query that finds the Brand relating to a given product and then updates the BrandId reference?
To do this manually would require a lot of hours because the product table contains thousands of lines.
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Question by:ThomasCookScandinavia
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3 Comments
 
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Accepted Solution

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PaulKeating earned 125 total points
ID: 22806808
I don't have your tables so I can't check it properly, but give this a try:

update Products
set BrandId = (select max(b.BrandId) from Brand b where charindex(b.BrandName,Products.Name) > 0)
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LVL 9

Expert Comment

by:jamesgu
ID: 22807205
update products
set brandid = b.brandid
from Brand b
where products.brandname = b.brandname
and b. LanguageID = 'eng'

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Author Closing Comment

by:ThomasCookScandinavia
ID: 31510066
This is great. Thanks a lot.
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