String split column and join to another table

Question

Let\'s say I have 2 tables like this :

Job Offers:

+----+------------+------------+
| ID |    Name    | Categories |
+----+--------         


        

Answer 1

You can greatly simplify this to something like this.

SELECT
    O.[ID]                  AS OfferID,
    O.[Name]                AS OfferName,
    c.[CategoryName]      AS CategoryName,
    c.[CategoryID]        AS CategoryID
FROM
    JobOffers AS O
outer apply [dbo].[Split](O.[Categories], ',') s
left join Categories as C on c.CategoryID = s.Items

The concern I have is your splitter. If there is more than a single select statement the performance is going to suffer horribly. For a good explanation of various splitters available you can visit this article.

http://sqlperformance.com/2012/07/t-sql-queries/split-strings