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Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Prepare a data flow diagram for computing the volume and surface area of a cylinder. Inputs are the height and radius of the cylinder. Outputs are the volume and surface area of th
WHAT IS DATABASE TECHNOLOGIES
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
Identification of concurrency Identification of concurrency: Dynamic model identifies concurrency. Two objects are said to be parallel (concurrent) if they can receive events a
Write a query that display ename annual salary and comm from emp table
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
Describe integrity and security? a) Domain constraint b) Referential integrity A value that appears in one relation for a given set of attributes also appear fo
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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