ACTUALTESTS Oracle 1Z0-031 Exam Q and A 05 30 05

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33 Chapter2 Replication Access does not have the native capability to replicate to other RDBMSs as SQL Server does. If an application needs to retrieve data from multiple systems with a minimum of user intervention or development effort, migrating to SQL Server may be able to solve this issue. For example, SQL Server can be configured to replicate its data to another data source that is used to do reporting on actions within multiple systems. You can also use SQL Server 7 with any OLE DB compliant data source to bring data together into one place.

Any of these systems can be replication partners with SQL Server using the built-in capabilities of SQL Server. If multi-system replication is a requirement for a system, SQL Server's capabilities can be used to justify a migration. Reasons Not to Migrate Just as there are reasons to migrate an application to SQL Server, there are also reasons not to migrate an application. Thke a good look at your motivations in migrating the application and make sure they are sound. You should ensure that the migration is necessary (after all, it is a lot of extra work) and that migrating the application will not negatively affect users.

Because you want to ensure that you don't attempt to work with this field as you would other fields, you should name it "timestamp," so that you will always know what the purpose of the field is. Access handles concurrency in tables without timestamps by comparing each field in the table to its original value. Adding a timestamp field to a SQL Server table forces applications, such as Access, to use this column to enforce concurrency without having to compare each field in the table. Only the unique index Access uses to 42 Planning the Upgrade identify records and the timestamp are compared against the table to enforce concurrency.

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