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List any eight applications of DBMS.
a) Universities
b) Airlines
c) Banking
d) Credit card transactions
e) Tele communication
f) Sales
g)Finance
h) Manufacturing
I) Human resources
Determine the rule that a value of a foreign key should appear as a value of some particular table is called a Ans: Referential constraint. The rule that a value of a fo
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
Example : Search the name, department number and salary of employees drawing minimum salary in that department. SELECT ENAME, SAL, DEPTNO FROM EMP WHERE SAL IN (SELECT MI
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
DROP TABLE Command: When an existing object is not needed for further use, it is always better to eliminate it from the database. To remove the existing object from the databas
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 aggregate functions? And list the aggregate functions supported by SQL? Aggregate functions are functions that take a collection of values as input and return a one va
Project Description: I need a point of sale for motels. It needs to run on windows and requires being network able so that we can have more than one computer using it at once.
Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
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