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What is a primary index?
A primary index is an index whose search key also explains the sequential order of the file.
In the first unit of this block, you have been given with the details of the Database Management System, its structure, advantages etc. This unit is an attempt to give you informat
Express the subsequent query in SQL assumes which the data is stored within EMPLOYEE table with relevant fields (i) Display name, job, salary, and hire date of employee who are
Define Network DBMS The NDBMS is built primarily on a one-to-many relationship, but where a parent-child representation between the data items cannot be ensured. This may occur
Describe the two types of methods for retrieving rows in Python? Fetchone()- Returns the next row as a sequence Fetch all()- Returns the entire result set like a strin
Read the description below and draw an Entity-Relationship diagram for it. You must use the symbols described in the course materials. This database will help the Parents Assocc
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
Illustrate how you can use QBE to perform logical AND and OR operation
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
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