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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;
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
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Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
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tell me the functionality,advantages and disadvantages of student database
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Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
What are the two integrity rules? Ans: The two integrity rules are: Entity Integrity Rule & Referential Integrity Rule. Entity Integrity Rule - If the attribute A of rel
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
lock and types of lock
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