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Whst is logical schema ?
Logical schema is the entire database.
Describe in brief about DBMS ?
what is meant semantic query optimization? how does it differ from other query optimization techniques?
Explain the use of constraints in functional model with suitable example. A constraint shows relationship between two objects at same time, or among various values of the sam
Describe the responsibilities of the DBA and the database designer ? The responsibilities of DBA and database designer are: 1. Planning for the database's future storage needs
What is data independence? Data Independence: Techniques which permit data to be changed without affecting the applications in which procedure it. There are two types of data
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
notes about update opreation
In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin
What is normalization? It is a method of analysing the given relation schemas based on their Functional Dependencies (FDs) and primary key to attain the properties (1).Minim
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
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