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Logical Operators
Rules of Precedence:
Order evaluated
Operator
1
All comparison operators
2
NOT
3
AND
4
OR
Example: To produce those records of salesman or president who are having salary above 15000/-
Select ename, job, sal from emp
Where job = 'SALESMAN' or job = 'PRESIDENT'
And sal>15000;
The query formulation as above is wrong for the problem statement. The correct formulation would be:
SELECT ENAME, JOB, SAL FROM EMP
WHERE (JOB = 'SALESMAN' OR JOB = 'PRESIDENT') AND SAL>15000;
Determine the term- Active values An active value is that has dependent values. Every dependent value registers itself with active value that contains a set of dependent values
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Question 1 Explain ER model Question 2 What are the characteristics of a computer provided information? Question 3 What are facts and guidelines to be considered when se
What is object containment? References among objects can be used to model dissimilar real-world concepts.
case study
What Is Recovery? During the life of a transaction, i.e., a after the start of a transaction but before the transaction commits, various changes may be made in a database state
Hello.I have database access assignment which consist of creation Form, Subform, Calculation, Macros
why shadow copy technique is used?
What is system log? What are the entries? Ans: The system log that is generally written on stable storage contains the redundant data required to recover from volatile
pine vally company
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