Home Forums SQL Server 2012 SQL Server 2012 - T-SQL T-SQL Puzzler - identify sets that have the same items (where set ID and items in same table) RE: T-SQL Puzzler - identify sets that have the same items (where set ID and items in same table)

  • March 2, 2015 at 5:03 pm

    #1781253

    Laurence Neville (3/1/2015)

    Thanks for the extra solutions. Got me reading about relational division: https://www.simple-talk.com/sql/learn-sql-server/high-performance-relational-division-in-sql-server

    :blush:

    My mantra: No loops! No CURSORs! No RBAR! Hoo-uh![/I]

    My thought question: Have you ever been told that your query runs too fast?

    My advice:
    INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
    The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.

    Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
    Since random numbers are too important to be left to chance, let's generate some![/url]
    Learn to understand recursive CTEs by example.[/url]
    [url url=http://www.sqlservercentral.com/articles/St