Advantage of SQL

Validation Based Protocol Validation phase is also known as optimistic concurrency control technique. In the validation based protocol, the transaction is executed…

Database Language A DBMS has appropriate languages and interfaces to express database queries and updates. Database languages can be used to read,…

Relationship of higher degree The degree of relationship can be defined as the number of occurrences in one entity that is associated…

SQL Set Operation The SQL Set operation is used to combine the two or more SQL SELECT statements. Types of Set Operation…

View Serializability A schedule will view serializable if it is view equivalent to a serial schedule. If a schedule is conflict serializable,…

Lock-Based Protocol In this type of protocol, any transaction cannot read or write data until it acquires an appropriate lock on it.…

Schedule A series of operation from one transaction to another transaction is known as schedule. It is used to preserve the order…

SQL Sub Query A Subquery is a query within another SQL query and embedded within the WHERE clause. Important Rule: A subquery…

DBMS vs. File System File System Approach File based systems were an early attempt to computerize the manual system. It is also…

Log-Based Recovery The log is a sequence of records. Log of each transaction is maintained in some stable storage so that if…