Oracle 10g Database uses escalating locks instead of row locks.

Name: Oracle 10g Database uses escalating locks instead of row locks.
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Oracle 10g Database uses row-level locking, not escalating locks. Escalating locks is a concept used in some other database systems, where the system may escalate a lock from a row-level lock to a page-level or table-level lock for performance reasons. However, Oracle uses row-level locking for efficient concurrency control.

Oracle 10g Database Uses Escalating Locks Instead of Row Locks