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What is the purpose of storage manager?
The storage manager is responsible for the following
a) Interaction with the file manager
b) Translation of DML commands in to low level files system commands
c) Storing, retrieving and updating data in the database
Determine the concept of Process Process: A process transforms the data values. It is represented as ellipse containing a description of transformation. Each procedure has a
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
In this exercise you will create ten records, each containing the following fields: student name, class: Freshman, Sophomore, Junior or Senior, Major: Liberal Arts or General Sci
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
A constraint named less_than_20 was defined on the field date_of_birth of table student. Delete this constraint. ALTER TABLE student DROP CONSTRAINT less_than_20;
Use of partial data by applications : In common, applications work with views rather than whole relations. Thus, it may be more appropriate to work with subsets of relations rather
What are the advantages of creating a table from existing table?
what is natural join?
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