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SELECT Statement
This statement is used for retrieving information from the databases. It can be coupled with many clauses. Let us talk about these clauses in more detail:
Using Arithmetic operator
Example:
SELECT ENAME, SAL, SAL+300
FROM EMP;
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
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Why is need for the multiple access paths?
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In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
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