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  1. #1
    zkrucz is offline Competent Performer
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    Editing Linked Databases via Query

    I am faced with the 2 GB/database limit. To circumvent, I want to create 2 databases on the back-end to store the same data and link the tables on the front-end. Once linked, I want to be able to use queries to edit/manipulate data in both data bases. However, I tested this process and it appears that I can certainly view the data in both, but I cannot edit/manipulate via queries using linked tables from both databases. Although, I can edit/manipulate with queries that point to each database, separately.


    What can I do to be able to query AND edit linked databases in the same query? Or, is this a limitation in Access?

  2. #2
    ranman256's Avatar
    ranman256 is offline VIP
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    you should be able to edit/manipulate data in ALL linked tables.
    *unless by manipulate you mean table design , then no, you cannot edit table design. You must edit directly in the main db.

    but edit & queries data all day long in the FE.

  3. #3
    zkrucz is offline Competent Performer
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    @ranman256

    Need your help to resolve this. I have two back-end databases each with 2 linked tables (tables ending with suffix ver1 and ver2). I set up mu front-end database importing those tables and set up my test query. 2 pics show the arrangement.

    Now, in my query, I can't change anything. So, what am I doing wrong?Click image for larger version. 

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  4. #4
    zkrucz is offline Competent Performer
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    @ranman256Click image for larger version. 

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    After I posted I realized that I simply imported one of the databases tables. I corrected that by linking them instead. But, I still can't edit anything through the query.

  5. #5
    June7's Avatar
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    Linking two primary keys is a one-to-one relationship. Why is NSver2 linking to 2 tables?

    Relationships don't make sense to me. Why are you joining tables that have identical structure?
    How to attach file: http://www.accessforums.net/showthread.php?t=70301 To provide db: copy, remove confidential data, run compact & repair, zip w/Windows Compression.

  6. #6
    zkrucz is offline Competent Performer
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    @ranman256
    Table1 ver1 and Table NS ver1 are linked in their own database. They carry different data, despite appearances.

    Table1 ver2 and TableNS ver 2 are linked in their own database. Same comment as above.

    I then linked Table1Ver1 to Table1ver2. And the same for the NS ver1 and ver2 to align them on the primary key to be able extract/edit the data for each primary key.

    How else should these Tables be linked in the query?

  7. #7
    June7's Avatar
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    How is data differenct since field names are exactly same?

    How did you split the data - by date period?

    Again, linking on primary keys results in a one-to-one relationship. Your query is non-updatable.

    Use forms for data entry/edit. Normally a form does data entry/edit for one table. Use form/subform arrangement.
    How to attach file: http://www.accessforums.net/showthread.php?t=70301 To provide db: copy, remove confidential data, run compact & repair, zip w/Windows Compression.

  8. #8
    zkrucz is offline Competent Performer
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    @ranman256

    OK, so I unlinked all links in primary databases (ver1 and ver2). Then, I only linked them in my Query, as shown. Still, I can't use teh query to edit anything.

    Question1: can a query be used to edit any linked Databases?

    if yes,Click image for larger version. 

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    Question2: how do I link the needed databases to do this?

  9. #9
    June7's Avatar
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    Now your links don't involve any primary keys. Links should be on associated primary/foreign key fields.

    Your data structure is not making sense. Did you see post 7?

    Don't do edits directly in table or query.
    How to attach file: http://www.accessforums.net/showthread.php?t=70301 To provide db: copy, remove confidential data, run compact & repair, zip w/Windows Compression.

  10. #10
    ssanfu is offline Master of Nothing
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    Just wanted to point out that "Type", "Cycle" and "Name" are reserved words in Access and shouldn't be used for object names

  11. #11
    zkrucz is offline Competent Performer
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    @June7 and ssnafu

    Thank you for your input and I made some modifications. In the end, I am able to link 2 databases and via queries, can edit data in all tables. First, I query/linked the tables "directly split" between the 2 DBs, and then I used a "Summ" Query for manipulating data. The test works fine now. Thank you.Click image for larger version. 

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  12. #12
    June7's Avatar
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    Maybe the queries work but links in Relationship builder don't make sense.
    How to attach file: http://www.accessforums.net/showthread.php?t=70301 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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