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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
Explain the integrity constraints: Not Null, Unique, Primary Key with an example each. Is the combination 'Not Null, Primary Key' a valid combination. Justify. Not Null - Shou
Natural Join : It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation
SET concept is used in which type of modelling? SET concept is used in Network Model.
The First Normal Form (1NF) Let us first describe 1NF: Definition: A relation (table) is in 1NF if 1. There are no duplicate tuples or rows in the relation. 2.
limitations and benefits in database tecknowlagy
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
diagrams and meaning
The basic merits of decomposition. The Advantages of Decomposition 1. Separate person can work on each subsystem. 2. A particular software engineer can specialize in a
explain the level architectures of the database management system
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
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