Home Forums Article Discussions Article Discussions by Author Discuss Content Posted by Gregory Larsen Stairway to Advanced T-SQL Level 6: Creating Rows Of Data Using The UNPIVOT Operator RE: Stairway to Advanced T-SQL Level 6: Creating Rows Of Data Using The UNPIVOT Operator

  • June 25, 2015 at 7:45 am

    #1808063

    g.britton (6/24/2015)

    Greg Larsen (4/27/2015)

    Comments posted to this topic are about the item <A HREF="/articles/Stairway+Series/125504/">Stairway to Advanced T-SQL Level 6: Creating Rows Of Data Using The UNPIVOT Operator</A>

    Consider using CROSS APPLY instead of UNPIVOT. More flexible (can unpivot multiple columns at once) and can generate better plans.

    Unpivot a table using cross apply[/url]

    CROSS APPLY VALUES is a more specific term for the use of CROSS APPLY in a manual unpivot. Dwain's written a great article here[/url].

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

    For fast, accurate and documented assistance in answering your questions, please read this article.
    Understanding and using APPLY, (I) and (II) Paul White
    Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden