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The Alpha Software Forum Participation Guidelines

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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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Query question

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  • Query question


    new to the forum, new to Alpha, so expect some really dumb questions....

    Two things I have not really figured out:


    I used to have a nice working query that looked for a matching first letter of a name: with mfirst containing the letter and FNAME a field in the table:

    query.filter = "left(FNAME,1) = mfirst"
    qry = tbl.query_create()

    then I decided to switch to a different method:

    P = form.load("frm_find_contact")
    filter="left(FNAME,1) = mfirst"
    result = P.QueryRun(filter)

    and the filter does not work anymore. I could not find any documentation that these two methods require a different filter syntax.

    2. A similar issue with QueryRrun: (Same structure as above).

    filter = "FNAME = 'adam'" -> 'works fine
    filter = "FNAME = 'varCntname1'" -> 'result = 0 although there definitely is an adam
    filter = "FNAME = varCntname1" ->' results in "invalid order or filter expression" error
    filter = "FNAME = alltrim(varCntname1)" -> ' results in "invalid order or filter expression" error

    Is there a known bug with QueryRun or what am I doing wrong.

    Thanks for your help


  • #2
    Re: Query question

    Hi Eriks,

    Welcome to Alpha.

    The function Left(value,1) is correct to use, but how do you want to query the data?

    Is this for a form, a browse or a report?

    Is the filter to be built in or do you want to use a filter with a user choice of letter?

    Have you looked at the Customer Information form in AlphaSports?
    Keith Hubert
    Alpha Guild Member
    KHDB Management Systems
    Skype = keith.hubert

    For your day-to-day Needs, you Need an Alpha Database!


    • #3
      Re: Query question

      filter = "FNAME = 'varCntname1'"

      This attempts to filter for, literally,

      Fname is equal to the text/characters "varCntname1"

      To Alpha there is no way to distinguish between

      filter = "FNAME = 'varCntname1'"
      filter = "FNAME = 'Cntname1'"
      filter = "FNAME = 'Joe'"

      All the above are filtering for character values.

      If you want to reference the contents of a variable varCntname1 you must tell Alpha to substitute the contents for the variable name. IOW, inside of the outer quotes, Alpha doesn't know about the variable.

      filter = "FNAME = '"+varCntname1+"'"
      filter = "FNAME = "+quote(varCntname1)

      are ways to accomplish the substitution.
      There can be only one.


      • #4
        Re: Query question

        Thank you very much, that helped.