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  1. #1
    mp6453 is offline Novice
    Windows 10 Office 365
    Join Date
    Jul 2020

    Append query with multivalue (attachment) field

    I'm trying to create an append query for table A to table B, but of course it's not so easy with multivalue fields.

    I'll use an example here where I have two identical tables, table A and B. The only field in each table is a multivalue (attachment) field. Btw, I know seasoned programmers prefer to avoid multivalue fields, but this is what I'm working with.

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    How would one accomplish this? From what I'm reading I think it takes two queries with an inner/outer join, but I don't know how to do that.


  2. #2
    ranman256's Avatar
    ranman256 is online now VIP
    Windows Vista Access 2010 32bit
    Join Date
    Apr 2014
    i think a single append will do this.
    you only need 2 queries just to EXTRACT whats in the attch fld.

  3. #3
    moke123's Avatar
    moke123 is offline Me.Dirty=True
    Windows 7 32bit Access 2010 32bit
    Join Date
    Oct 2012
    Btw, I know seasoned programmers prefer to avoid multivalue fields, but this is what I'm working with.
    Not only do we avoid using multivalue fields, we especially avoid using attachments fields.

  4. #4
    June7's Avatar
    June7 is offline VIP
    Windows 10 Access 2010 32bit
    Join Date
    May 2011
    The Great Land
    Hope you understand that a multi-value or attachment field involves a hidden table where the data/objects are actually stored.

    An attachment field does allow multiple elements and is therefore a type of multi-value field but it is different because it is saving objects, not just alpha-numeric data.

    Attachment field has properties: FileData, FileName, FileType
    Regular multi-value field has property: Value

    I tried various SQL structures for each type of field in attempt to create new records in table B. Nothing works.
    It would be easier to just copy the table.

    Maybe your example is too simplified. Why would you want identical tables?
    How to attach file: To provide db: copy, remove confidential data, run compact & repair, zip w/Windows Compression.

Please reply to this thread with any new information or opinions.

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