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Access Last function to SQL Server

  • March 30, 2010 at 8:45 am

    #220729

    Okay... I'm stuck. 🙁

    Does anyone know how to get around / convert an Access Last function to SQL Server? I have the following query that I need to convert.

    SELECT OPERATION_SCHED.SCHEDULE_ID, OPERATION_SCHED.RESOURCE_ID, OPERATION_SCHED.WORKORDER_BASE_ID,

    OPERATION_SCHED.WORKORDER_SUB_ID,

    Last(OPERATION_SCHED.SEQUENCE_NO) AS LastOfSEQUENCE_NO,

    Last(DATEADD(d, 0, DATEDIFF(d, 0, [FINISH_DATE])) AS FINISH,

    OPERATION_SCHED.WORKORDER_LOT_ID, OPERATION_SCHED.WORKORDER_SPLIT_ID

    FROM OPERATION_SCHED

    GROUP BY OPERATION_SCHED.SCHEDULE_ID, OPERATION_SCHED.RESOURCE_ID, OPERATION_SCHED.WORKORDER_BASE_ID,

    OPERATION_SCHED.WORKORDER_SUB_ID, OPERATION_SCHED.WORKORDER_LOT_ID, OPERATION_SCHED.WORKORDER_SPLIT_ID

    ORDER BY OPERATION_SCHED.WORKORDER_BASE_ID;

  • April 10, 2010 at 1:00 pm

    #1149628

    last() returns the last row of a result set - doesn't it?

    A brute force solution would be to select top 1 blah-blah-blah order by blah-blah DESC

    _____________________________________
    Pablo (Paul) Berzukov

    Author of Understanding Database Administration available at Amazon and other bookstores.

    Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.

  • April 10, 2010 at 1:46 pm

    #1149639

    "Last(..)" returns the last vaule according to what ordering criteria? You do not specify any ordering criteria that could apply to a LAST(..) aggregate function, and by definition, SQL has no default or implicit ordering.

    [font="Times New Roman"]-- RBarryYoung[/font], [font="Times New Roman"] (302)375-0451[/font] blog: MovingSQL.com, Twitter: @RBarryYoung[font="Arial Black"]
    Proactive Performance Solutions, Inc.     [/font]    [font="Verdana"] "Performance is our middle name."[/font]

  • April 11, 2010 at 10:20 am

    #1149724

    Please see the following (very short) thread:

    http://www.sqlservercentral.com/Forums/Topic893987-149-1.aspx

    I posted three ways to emulate the LAST function there.

    Paul

    Paul White
    SQLPerformance.com
    SQLkiwi blog
    @SQL_Kiwi

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