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Old January 17th, 2007, 09:36 AM
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Default Updating a database with new records

I have a main database with tables linked using one-to-many relationship. forms have been created for data entry. The database is based at the main office. However, the data has to be collected from places away from the office. I want to have the the same database to be put on Laptop computers for data capture on site. But I want at the end to download all the new data or records from the laptop computer database. I want only to update the main database with only new records from the laptops. What should I do?

Old January 17th, 2007, 11:53 AM
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The first thing you need to do is to use a superkey instead of an autonumber primary key.

A superkey is a combination of various data elements that will be the same no mater where the data is first entered. For example, if the database is being used to enter customer orders in the field, the superkey might be a combination of the salesperson's name, the customer name or number, the date of the order, AND an autonumber field (in case the sales person has many orders from the same customer.)

Then to uplaod this new data, create a find unmatched query that uses the superkey field, and then do an append query for all records that don't have matches.

You can make this process fully automated, or have the salesperson, in this case, start the process and approve each transaction.

Need more help?


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