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Recovery Techniques:After Reading the types of failures and database errors, let us talk about how to recover from the failures. Recovery can be complete using/restoring the previous consistent state (backward recovery) or by moving forward to the next consistent state as per the committed transactions recovery (forward recovery). Please note that a system can recover from software and hardware failures by using the forward and backward recovery only if the system log is intact. What is the system log? We will talk about it in more detail, but first let us describe forward and backward recovery.
What is normalization? It is a method of analysing the given relation schemas based on their Functional Dependencies (FDs) and primary key to attain the properties (1).Minim
Project Description: This is going to be a School portal to handle each activities in school such as, School fees payment, online registration and every other payment, course re
what do you understand by enhanced entity-relationship
how the string works as keyword?
SET concept is used in which type of modelling? SET concept is used in Network Model.
The issues relating to the Design of the Physical Database Files Physical File is a file as stored on the disk. The major issues relating to physical files are: • Cons
The JOIN operation is applied on two relations. When we want to choose related tuples from two given relation join is used. The join operation need that both the joined relations m
write program
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Unrepeatable reads : Assume T7 reads X twice during its implementation. If it did not update X itself it could be very disturbing to see a dissimilar value of X in its next read. B
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