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Visual Fox Pro checks these properties when an update is requested before committing the update.

To update remote data you must set five properties: Tables, Key Field List, Update Name List, Updatable Field List, and Send Updates.

By extending SQL, PL/SQL offers a unique combination of power and ease of use.

It is important not to allow one operation to succeed while the other fails.

At the end of a transaction that makes database changes, Oracle makes all the changes permanent or undoes them all.

You can manipulate Oracle data flexibly and safely because PL/SQL fully supports all SQL data manipulation statements (except ), transaction control statements, functions, pseudocolumns, and operators.

PL/SQL also supports dynamic SQL, which enables you to execute SQL data definition, data control, and session control statements dynamically.

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