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Define- relational algebra.
The relational algebra is a procedural query language. It having of a set of operations that take one or two relation as input and make a new relation as output.
Explain Composite attribute in SQL ? Composite attribute: A composite attribute has many components, each of that is atomic or composite.
differences between a classified catalog and a dictionary catalog
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Which operation is used if we are interested in only certain columns of a table? PROJECTION operation is used if we are interested in only certain columns of a table.
what is Mapping Constraints? with examples
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
Question 1: (a) Planning and management of ICT projects have a very poor record in developing countries. Briefly explain five critical success factors for correct implementa
Define various ways in which SELECT statement can be used for record selection Technology? SELECT gives you control over a number of aspects for record retrieval: 1) Which
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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