• ryan.blosser (5/18/2013)


    This is what I have been looking for and forgive me if this is a simple question (I am trying to learn some of these concepts, like in-line table-valued functions), but how do you easily apply this to an entire table? How do you use this, even? It returns a table (not permanent), so I selected the result set into a new table, but I don't know if that defeats the point of using the TVF in the first place.

    This:

    select * into dbo.testtable from

    (SELECT t1.id as id, t1.title as title, clean.cleaned as cleaned from t1

    cross apply dbo.if_cleanwithreplace(t1.title) clean) a

    fixes one column

    You can simplify that query quite a bit. No need for the nesting.

    SELECT t1.ID, t1.Title, clean.Cleaned

    INTO dbo.TestTable

    FROM t1

    CROSS APPLY dbo.if_cleanwithreplace(t1.Title) clean

    ;

    The purpose of the iTVF, in this case, is to function more like an iSF (Inline Scalar Function) which is typically about 7 times faster than a run-of-the-mill scalar function. See the following article for more on that.

    http://www.sqlservercentral.com/articles/T-SQL/91724/

    Putting the results in a table doesn't negate the value of such functions. It depends on what you want to do. The results could just as easily be returned directly.

    --Jeff Moden


    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.


    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)