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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 data link layer
Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.
Construct an ER diagram for a hospital along with a set of patients and a set of medical doctors Associate with every patient a log of the several tests and examinations conducted.
Create a view emp_dep containing e_name and number of dependents from the tables employee and dependent of (i) CREATE VIEW emp_dept AS SELECT ename, COUNT(*) FROM employee, dep
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
what is the importance of back up files
Which is another name for weak entity? Child is another name of weak entity.
A well-maintained relational DBMS has a high level of data integrity. What features of a relational DBMS contribute towards this level of integrity? Relational DBMS gives high
how design database from begining
what should be included in this???
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