Access for Office 365 Access 2019 Access 2016 Access 2013 Access 2010 Access 2007 You use update queries in Access databases to add, change, or delete the information in an existing record. You can think of update queries as a powerful form of the Find and Replace dialog box. You cannot use an update query to add new records to a database, or to delete 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. Note: This article doesn’t apply to Access web apps – the kind of database you design with Access and publish online. In this article Overview Here are the similarities and differences between Find and Replace and an update query: Like the Find and Replace dialog box, an update query lets you specify which value is being replaced, and what the new value is. Unlike the Find and Replace dialog box, an update query lets you: • Use criteria that do not depend on the value that you want to replace.

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• Update lots of records in one pass. • Change records in more than one table at the same time. Restrictions on fields that can be updated An update query cannot be used to update data in the following types of fields: • Calculated fields The values in calculated fields do not permanently reside in tables. They only exist in your computer's temporary memory after Access calculates them.

Because calculated fields do not have a permanent storage location, you cannot update them. • Fields from a totals query or a crosstab query The values in these types of query are calculated, and therefore cannot be updated by an update query.

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• AutoNumber fields By design, the values in AutoNumber fields change only when you add a record to a table. • Fields in unique-values queries and unique-records queries The values in such queries are summarized. Some of the values represent a single record, and others represent more than one record. The update operation is not possible because it is not possible to determine what records were excluded as duplicates, and therefore not possible to update all the necessary records. This restriction applies whether you use an update query or try to update data manually by entering values in a form or a datasheet. • Fields in a union query You cannot update data from fields in a union query because each record that appears in two or more data sources only appears once in the union query result.