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What are the objectives of query processing?
Ans: The objectives of query processing is to transform a query written in a high level language into a accurate and efficient execution strategy expressed in a low level language and implement the strategy to retrieve the data.
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
What is a homogeneous distributed database? In homogeneous distributed databases, all sites have the same database management system software, are aware of one another, and agr
What are composite attributes? Composite attributes can be separated in to sub parts.
What Is Recovery? During the life of a transaction, i.e., a after the start of a transaction but before the transaction commits, various changes may be made in a database state
What is a state chart diagram? State diagrams (State Chart Diagram) explain all possible states that a particular object can get into, and how object's state changes as result
Explain the term- Data Flows Data Flows: A data flow connects output of an object or process to input of another process or object. It represents an in-between data value wit
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
1.Suppose you are given a dataset that consists of a random sample of tasters, on which the following variables were obtained: (y) Zpref = taste preference for green beans store
In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): Ans: The relational database schema f
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