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what is the purpose of the 'wildcard' in data base queries

Discussion in 'Information Technology' started by Boyo, Jul 28, 2006.

  1. Boyo

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    Hi...can anyone help?
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  3. Rick Brandt

    Rick Brandt
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    "Boyo" <Boyo@discussions.microsoft.com> wrote in message
    > Hi...can anyone help?

    Wildcard * represents "any number of characters"
    Wildcard ? represents "any single character"

    If I want all records with "Bob" in the [FirstName] field I use...
    WHERE [FirstName] = "Bob"

    If I want all records that start with the letter "B" in the [FirstName] field I
    WHERE [FirstName] Like "B*"

    If I want all records that start with the letter "B" in the [FirstName] followed
    by any two characters followed by a "D" and then anything afterwards field I
    WHERE [FirstName] Like "B??D*"

    In other database systems the * would be replaced by % and the ? would be
    replaced by _.

    Rick Brandt, Microsoft Access MVP
    Email (as appropriate) to...
    RBrandt at Hunter dot com
  4. Douglas J Steele

    Douglas J Steele
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    "Rick Brandt" <rickbrandt2@hotmail.com> wrote in message
    > In other database systems the * would be replaced by % and the ? would be
    > replaced by _.

    That may be a little misleading. If you're using ADO, you still use %
    instead of *, and _ instead of ?, even if you're using Access as the client.

    Doug Steele, Microsoft Access MVP
    (no e-mails, please!)
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