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Example: Find out the employee who draws a salary more than the average salary of all the departments.
EMPNO
ENAME
JOB
SAL
DEPTNO
7566
Nirmal
MANAGER
2975
10
7788
Kailash
ANALYST
3000
7839
Karuna
PRESIDENT
5000
20
7902
Ashwin
7905
Ashwini
4000
SELECT EMPNO, ENAME, JOB, SAL
FROM EMP
WHERE SAL> ALL (SELECT AVG (SAL)
GROUP BY DEPTNO);
OUPUT:
Wait-die" scheme : The idea is based on non-preventive method. It is based on a simple rule: If Ti requests a database resource that is held by T
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Question 1 List and explain various Normal Forms. How BCNF differs from the Third Normal Form and 4th Normal forms? Question 2 Describe the concepts of Structural Semantic Da
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
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Example -GRANT CREATE SESSION TO MCA12; (This command gives system level permission on creating a session - not portable) GRANT SELECT ON EMP TO MCA12; (Object level permi
Describe Query evaluation engine? Query Evaluation engine: Vehicle executes low-level instructions obtained through the DML compiler. The Storage Manager Components gives in
A student entity type has the following attributes,name..
When is UPDATE_STATISTICS command used? - When processing of large data is done, this command is used. - Whenever large number of modification, deletions or copy takes place
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