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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:
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I am going to develop a web site to present decision tree structure. For this, I want a web application with AJAX technology to connect the database and prepare the decision tree's
QUESTION (a) Give two advantages of using Linked List as compared to arrays. (b) (i) You are working as programmer at the Orange Mauritius branch. You have been asked to cre
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
Explain weak and strong entity type ? Weak and Strong entity type: An entity set which does not have a primary key is referred to as a weak entity set. The existence of a wea
what should be included in this???
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