The following section will show you how to test updating, inserting, and deleting the data.
There are several ways to update data in an Access database.
All nonmissing values for variables in the transaction data set replace the corresponding values that are read from the master data set.
You add a record to your database when you have a new item to track, such as a new contact to the Contacts table.
When you add a new record, Access appends the record to the end of the table.
To update a record in any table it is required to locate that record by using a conditional clause.
Below example uses primary key to match a record in employee table.
When there are many records, you can use the Find and Replace dialog box and filter for the record.
You can navigate between records by using the navigation buttons.The new observation may be modified by other observations from the transaction data set before it is written to the new data set.Bind variables are placeholders inside a SQL statement.Try out following example to understand update operation.You need to provide an employee ID to update an employee salary.The general form of the UPDATE statement is If the master data set contains an observation that does not correspond to an observation in the transaction data set, the DATA step writes that observation to the new data set without modification.