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What is a view? Make a view of EMP table named DEPT 20, to display the employees in department 20 and their annual salary.
Ans: View is a virtual table that does not consists of it own data it fetch the data from the original table.
Create view DEPT20 as select * from dept;
Where dno=20 group by dno;
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A buyer for a large department store chain must place orders with an athletic shoe manufacturer six months prior to the time the shoes will be sold in the department stores. In par
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
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Benefits of using heuristics
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