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Never store a value that is dependent on other fields: it's a basic rule of normalization.Break the rule, and you have to worry about how to maintain the calculation correctly in every possible circumstance.There are circumstances where storing a calculated result makes sense - typically where you need the flexibility to store a different value sometimes.Say you charge a construction fee that is normally an additional 10%, but to win some quotes you may want to waive the fee. In this case it makes perfect sense to have a record where the fee is

Tip: You might want to back up your database before you run an update query.

Note: You cannot run an update query in a Web browser.

If you want to run an update query in an Access Web database, you must first open the database by using Access. If you are using an Access web app, you can use data macros to update or change existing data in a set of records.

You cannot use an update query to add new records to a database, or to delete entire records from a database.

To add new records to a database you use an append query, and to delete whole records from a database you use a delete query.

instead of 10%, so you must store this as a field in the table.Hope that helps, If you have more questions, please feel free to post again. The simple answer to that is because it is calculated. Because if for any reason that the values change, then you have to update many fields and rows of data in order to keep the information accurate.Hope that helps, If you have more questions, please feel free to post again. Yeah, that's what I keep reading all over when I research this problem, but if I want to store calculated values in a table, that's really my call to make, not Microsofts. What I am trying to enter is just the price paid for a group of items, then divided by the number of the items, so the calculated value is the price per item.You cannot undo the results of an update query, and making a backup helps make sure that you can reverse your changes if you change your mind.

updating calculated fields in access-51updating calculated fields in access-70updating calculated fields in access-8

Tip: You might want to back up your database before you run an update query.

Note: You cannot run an update query in a Web browser.

If you want to run an update query in an Access Web database, you must first open the database by using Access. If you are using an Access web app, you can use data macros to update or change existing data in a set of records.

You cannot use an update query to add new records to a database, or to delete entire records from a database.

To add new records to a database you use an append query, and to delete whole records from a database you use a delete query.