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Explain the Natural join
Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinations of tuples in R and S which are equal on their general attribute names. In this just only one column along attributes comprising similar name is retained.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an ex
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
Add generation capabilities and/or tailor the built-in functionality of generator. This enables you to produce "all" the test data for the MySQL tables you produced in the previous
Competition entrants can be either Individuals, or Teams. A Team is usually sponsored by a business, and, in that case, the team members would all wear T-shirts with the sponsoring
Explain the following functions of Oracle with suitable examples: (i) To_Char( ) (ii) Count( ) (iii) Trim( ) (iv) Length( ) Ans: (i) To_char( ): The TO_CHAR function conver
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We need help in Booking System for Golf Business Development of a web based booking system which permits clients to book golf lessons with the following features- a) 4 user p
Describe the types of Inheritance 1. Single inheritance 2. Multiple inheritance 3. Hierarchical inheritance 4. Multilevel inheritance
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
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