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Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?
- a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}
- b){t.Fname, t.Lname | t.Salary > 15000}
- c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}
- d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}
Correct answer is option 'C'. Can you explain this answer?
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Which of the given tuple calculus expressions can be used to find firs...
The condition EMPLOYEE(t) specifies that the range relation of tuple variable t is EMPLOYEE. First name and last name of EMPLOYEE tuple t that satisfies the condition t.Salary > 15000 will be retrieved.
{t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000} is the correct expression.
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Which of the given tuple calculus expressions can be used to find firs...
Explanation:
Correct Tuple Calculus Expression:
- {t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}
Explanation:
- The correct tuple calculus expression {t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000} can be used to find the first name and last name of all employees whose salary is above $15000 from the relation EMPLOYEE.
- The condition 'AND' is used in the expression to filter out only those tuples where the employee's salary is greater than $15000.
- The 'EMPLOYEE(t)' part ensures that we are selecting tuples only from the EMPLOYEE relation.
- By combining these conditions using 'AND', we can accurately retrieve the required information about employees with salaries above $15000.
Incorrect Tuple Calculus Expressions:
1. {t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}
- This expression uses 'OR' condition which will return tuples where either the employee is part of the EMPLOYEE relation or their salary is above $15000. This may not accurately filter out only the employees with salaries above $15000.
2. {t.Fname, t.Lname | t.Salary > 15000}
- This expression does not include the condition to select tuples only from the EMPLOYEE relation. It may return tuples from other relations as well, leading to inaccurate results.
3. {t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}
- This expression incorrectly includes 'EMPLOYEE(t)' as an attribute to be selected, which is unnecessary. The correct format should only include attributes to be projected, not relations.
Correct Tuple Calculus Expression:
- {t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}
Explanation:
- The correct tuple calculus expression {t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000} can be used to find the first name and last name of all employees whose salary is above $15000 from the relation EMPLOYEE.
- The condition 'AND' is used in the expression to filter out only those tuples where the employee's salary is greater than $15000.
- The 'EMPLOYEE(t)' part ensures that we are selecting tuples only from the EMPLOYEE relation.
- By combining these conditions using 'AND', we can accurately retrieve the required information about employees with salaries above $15000.
Incorrect Tuple Calculus Expressions:
1. {t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}
- This expression uses 'OR' condition which will return tuples where either the employee is part of the EMPLOYEE relation or their salary is above $15000. This may not accurately filter out only the employees with salaries above $15000.
2. {t.Fname, t.Lname | t.Salary > 15000}
- This expression does not include the condition to select tuples only from the EMPLOYEE relation. It may return tuples from other relations as well, leading to inaccurate results.
3. {t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}
- This expression incorrectly includes 'EMPLOYEE(t)' as an attribute to be selected, which is unnecessary. The correct format should only include attributes to be projected, not relations.
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Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer?
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Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer?.
Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the given tuple calculus expressions can be used to find first name and last name of all the employees whose salary is above $15000 from the relation EMPLOYEE?a){t.Fname, t.Lname | EMPLOYEE(t) OR t.Salary > 15000}b){t.Fname, t.Lname | t.Salary > 15000}c){t.Fname, t.Lname | EMPLOYEE(t) AND t.Salary > 15000}d){t.Fname, t.Lname, EMPLOYEE(t) | t.Salary > 15000}Correct answer is option 'C'. Can you explain this answer?.
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