Lost update problem is

Related MCQs

• The problem of ordering the update in multiple updates is avoided using
• A                    consists of a sequence of query and/or update statements.
• The                      requires that each transaction Ti executes in two or three different phases in its lifetime, depending on whether it is a read-only or an update transaction.
• The log is a sequence of                     recording all the update activities in the database.
• In the                        scheme, a transaction that wants to update the database first creates a complete copy of the database.
• Whenever an update operation occurs on a page, the operation stores the LSN of its log record in the                field of the page.
• A DBMS uses a transaction ____ to keep track of all transactions that update the database
• The UPDATE SQL clause can _____________
• Which s essential a business problem not a data problem:
• Which of the following stores several gigabytes of data but usually lost when power failure?