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Example-Find the employee name, salary, department number and average salary of his/her department, for those employees whose salary is more than the average salary of that department.
SELECT A.ENAME, A.SAL, A.DEPTNO, B.AVGSAL
FROM EMP A, ( SELECT DEPTNO, AVG (SAL) AVGSAL
GROUP BY DEPTNO) B
WHERE A.DEPTNO=B.DEPTNO AND A.SAL> B. AVGSAL;
WHAT IS MEANT BY E-R MODEL
Objectives After Reading this part, you should be able to: Explain the term CONCURRENCY; Describe the term transaction and concurrent transactions; Talk about co
Explain algorithm of ER To Relational Mapping ? ER-to-Relational Mapping Algorithm: 1) Step 1: Mapping of regular entity types: For each strong entity type E, form a relatio
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Q. Describe how an ER schema can be represented by relation schemas and constraints arising from ER design can be mapped to constraints on a relation schema. The entity rela
What is a records management consultation? Our organization is an authority for disseminating your specific requirements and giving you with a solution to effectively manage yo
Data Fragmentation "Fragmentation includes decomposing the data in relation to non-overlapping component relations". Why do we require fragmenting a relation?
Define a table in SQL known as Client that is used to store information about the clients. Define CLIENT_NO as the primary key whose first letter must begin with ‘C'. Also ensure t
Need 2 projects completed in 3NF format.
Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis
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