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What is SQL, and why is it important? SQL stands for Structured Query Language, and is the most significant data processing language in use today. It is not a complete programm
What is the difference between a HAVING CLAUSE and a WHERE CLAUSE? HAVING CLAUSE - HAVING CLAUSE is used only with SELECT statement. - It is normally used in a GROUP BY
define anomalies and different types of anomalies with example
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
The Internal or Physical Level The collection of files permanently stored on secondary storage devices is called as the physical database. The internal or physical level is t
Which component is not included in database environment ? A users component is not included in database environment.
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
HOW MANY TYPES OF VIEWS
Explain the disadvantages of file oriented approach? In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. In
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