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Having clause
Example: Find maximum salary and department number of those departments where maximum salary is more than Rs 20000/-.
SELECT DEPTNO, MAX(SAL) FROM EMP
GROUP BY DEPTNO HAVING MAX(SAL) > 20000;
Eliminate Columns Not Dependent On Key The Employee Relation satisfies - First normal form - As it has no repeating groups. Second normal form - As it do not have multi-a
how design database from begining
what is 3nf
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
SET concept is used in which type of modelling? SET concept is used in Network Model.
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
System Design: An Object Oriented Approach Any software systems always try to change and evolve as technology and business rules evolve. The development of information systems
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
Discuss the importance and characteristics of database backup and recovery procedures, then describe the actions that must be detailed in backup and recovery plan
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