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Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table
EMPNO
ENAME
MGRID
.....
1
Nirmal
4
2
Kailash
3
Veena
Boss
NULL
...
Example: Search the name of each employee's manager name.
SELECT WORKER.ENAME || 'WORK FOR' || MANAGER.ENAME FROM EMP WORKER, EMP MANAGER
WHERE WORKER.MGR=MANAGER.EMPNO;
Output:
Describe Specialsation and generalization? Specialisation /generalization: This is a top down and bottom up approach to the design of database. It displays the IS_A relation
why shadow copy technique is used?
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10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the delet
Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)
project on dbms
how to find entities
Give some encryption techniques? A) DES B) AES C) Public key encryption
Normalize the following tables upto and including the 3NF. Submit a 1 page printout of only the final set of normalized tables in Data Architect. Just use Data Architect to do the
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