11 DATABASE EXPERTS ONLY MUST HAVE ORACLE SQL
shakey2010Multiuser databases use locking mechanisms designed to solve the problems associated with data concurrency, consistency, and integrity. However, according to Oracle’s documentation, “Because the locking mechanisms of Oracle Database are tied closely to transaction control, application designers need only define transactions properly, and Oracle Database automatically manages locking. Users never need to lock any resource explicitly, although Oracle Database also enables users to lock data manually.”
Review the Overview of the Oracle Database Locking Mechanism in Oracle Database Concepts https://docs.oracle.com/database/121/CNCPT/consist.htm#CNCPT1331
- Describe a scenario where an application developer would allow a user to lock data manually.
- Post your description to the discussion.
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