Oracle Concurrent Access Guide
In Oracle databases, handling concurrent access can typically be achieved through the following methods:
- Using transactions: Ensure consistency of concurrent access by using transactions. Transactions can guarantee that a group of operations either all successfully commit or all roll back. By using transactions, it is possible to prevent data inconsistencies that may arise during concurrent access.
- By utilizing locking mechanisms, Oracle database offers various types of locks to control concurrent access. For instance, row-level locks or table-level locks can be used to ensure that only one transaction can modify a specific piece of data at a time.
- Utilize MVCC (Multi-Version Concurrency Control): MVCC is the default concurrency control mechanism in Oracle database that enables concurrent access by storing different versions of data in the database. Each transaction sees a consistent version of the data when reading, preventing read-write conflicts.
- Using PL/SQL packages: You can encapsulate database operations by writing PL/SQL packages and control concurrent access using exclusive locks or other methods. This helps to ensure data consistency during concurrent access.
Overall, Oracle database provides various ways to handle concurrent access, developers can choose the appropriate method based on specific needs to ensure data consistency and concurrency.
