Sample update query

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Tweet a thanks. Learn to code for free. Get started. Assign the name of the original version to the backup copy, and then open the renamed backup copy in Access. Step 1: Create a select query to identify the records to update. Step 2: Update the records. On the Create tab, in the Queries group, click Query Design. Select the table or tables that contain the records that you want to update, click Add , and then click Close.

The table or tables appear as one or more windows in the query designer, and the windows list all the fields in each table. This figure shows the query designer with a typical table. Double-click the fields that you want to update in the table windows. The selected fields appear in the Field row in the query design grid. This figure shows the query design grid with all the fields added. To limit the query results based on field values, in the query design grid, in the Criteria row, enter the criteria that you want to use to limit the results.

The following table shows some example criteria and explains the effect that they have on the results of a query. Note: Many of the examples in this table use wildcard characters to make the query more flexible or powerful.

If your database uses the ANSI wildcard characters, use single quotation marks ' instead of pound signs. Finds all records where the exact contents of the field are not exactly equal to "Germany. Finds all records except those starting with T. Finds all records that do not end with t. In a text field, finds all records that start with the letters A through D. Finds all records that include the letter sequence "ar".

Finds all records that begin with "Maison" and contain a 5-letter second string in which the first 4 letters are "Dewe" and the last letter is unknown. Finds all records for February 2, Uses the Date function to return all records containing today's date. Uses the Date and DateAdd functions to return all records between today's date and three months from today's date. Returns all records that contain a zero-length string.

You use zero-length strings when you need to add a value to a required field, but you don't yet know what that value is. For example, a field might require a fax number, but some of your customers might not have fax machines. In that case, you enter a pair of double quotation marks with no space between them "" instead of a number. On the Design tab, in the Results group, click Run.

To add any fields that you want to include in the query design, drag the additional fields to the query design grid. On the Design tab, in the Query Type group, click Update.

This procedure shows you how to change a select query to an update query. When you do this, Access adds the Update to row in the query design grid. The following illustration shows an update query that returns all the assets purchased after January 5, and changes the location to "Warehouse 3" for all the records that meet that criterion. Locate the field that contains the data that you want to change, and then type your expression your change criteria in the Update to row for that field.

Where the ProductID values in the current table match the ProductID values in table named Order Details, this expression updates sales totals by multiplying the values in a field named Quantity by the values in a field named UnitPrice. The expression uses the DSum function because it can operate against more than one table and table field. Truncates removes the leftmost characters in a text or numeric string and leaves the 5 rightmost characters. Note: When you run the query, you might notice that some fields are missing from your result set.

If your query contains fields that you don't update, Access does not display those fields in the results, by default. For example, you might include ID fields from two tables to help ensure that your query identifies and updates the correct records.

If you don't update those ID fields, Access does not display them in the results. Operation Failed. If so, check out our paper on Error Operation must use an updatable query: Dealing with Non-Updateable Queries and the Use of Temporary Tables in Microsoft Access which discusses some of the issues and workarounds.

They are extremely powerful and eliminate a lot of manual updates and unnecessary coding. They are also much easier to maintain and debug than module code. When confronted with the limitations of what you can do with SQL Syntax, you can supplement Access update queries with your own functions letting Access take care of updating the records, while you focus on the calculations.

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