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Objectives
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
intent locking
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
After going by the database architecture, let us now dwell on an important query: how is the data organised in a database? There are a lot of basic structures that exist in a datab
List two restrictions that are applied on the modification (updation, insertion or deletion) of base tables through view. Ans: The two restrictions are: 1. If a view
Define instance and schema? Instance: Collection of data stored in the data base at a certain moment is Schema: The overall design of the data base is known as the data base
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
what is Lossless-join decomposition
prototype of a distributed information system for a national car part retail outlet chain.
Creating views with Replace option : This option is used to alter the definition of the view without recreating and dropping it or regranting object privileges previously granted o
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