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Category: Serializability

What is Lost Update Problem in DBMS?

November 30, 2017 Ashutosh Tripathi

In a schedule, if update performed by transaction T1 on data item ‘X’ gets overwritten by the update performed by transaction T2 on same data

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Serial Schedules, Concurrent Schedules and Conflict Operations

November 28, 2017 Ashutosh Tripathi

A schedule is the representation of execution sequence for all the instructions of the transactions. Schedules are categorized in two types: Serial Schedules Concurrent Schedules

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Precedence Graph to check Conflict Serializable Schedule

April 15, 2017 Ashutosh Tripathi

Precedence graph algorithm can be used to find out whether the given concurrent schedule is conflict serializable or not. Algorithm: Create the number of node

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