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What is called query processing?
Query processing refers to the range of activities included in extracting data from a database.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What are partial, alternate,, artificial, compound and natural key? Partial Key: It is a set of attributes that can uniquely recognize weak entities and that are related to s
Create 1 experiment to demonstrate an aspect of query optimisation by using access-path structures (indexes), decomposition, or denormalisation. Once satisfied with your experiment
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Give two profit of Reuse of Code. Reusing the implementation . Place existing class directly inside a new class. The new class can be made up of any number and type of the oth
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
What are the two types of errors? The two types of errors are: a) Logical error b) System error
Determine the language that needs a user to specify the data to be retrieved with no specifying exactly how to get it is Ans: Non-Procedural DML
Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in o
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