Which statement issues a lock on tables?
(a) ISSUE LOCK
(b) LOCK ISSUE
(c) LOCK TABLES
(d) ISSUE LOCKS
(a) ISSUE LOCK
(b) LOCK ISSUE
(c) LOCK TABLES
(d) ISSUE LOCKS
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Right choice is (c) LOCK TABLES
To explain I would say: Locks can be acquired and released explicitly by issuing LOCK TABLES and UNLOCK TABLES statements. Normally the server’s lock manager automatically acquires locks as necessary and releases them when they no longer are needed.