Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
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Chapter 10, Problem 8RQ

Explanation of Solution

Lock:

Lock is the process that ensures the unique use of data item for particular transaction. If the data item is locked by one transaction, then the other transactions cannot use the data item until the first transaction unlocks the data item.

Working procedure of lock:

  • A transaction requires lock prior to lock and unlock the transactions. The lock prior is responsible for assigning and releasing locks. It is otherwise called as “lock manager”...

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