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Consider the table employee(empId, name, department, salary) and the two queries Q1 ,Q2 below. Assuming that department 5 has more than one employee, and we want to find the employees who get higher salary than anyone in the department 5, which one of the statements is TRUE for any arbitrary employee table?
  • a)
    Q1 is the correct query
  • b)
    Q2 is the correct query
  • c)
    Both Q1 and Q2 produce the same answer
  • d)
    Neither Q1 nor Q2 is the correct query
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the table employee(empId, name, department, salary) and the t...
Let the employee(empId, name, department, salary) have the following instance. empId name department salary ----------------------------------
Now the actual result should contain empId : e1 , e3 and e5 ( because they have salary greater than anyone employee in the department '5') -------------------------------------------------------- Now Q1 : Note : EXISTS(empty set) gives FALSE, and NOT EXISTS(empty set) gives TRUE.
Q1 will result only empId e1. --------------------------------------------------------- whereas Q2 :
Q2 will result empId e1, e3 and e5. -------------------------------------------------------- Hence Q2 is the correct query.
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Consider the table employee(empId, name, department, salary) and the two queries Q1 ,Q2 below. Assuming that department 5 has more than one employee, and we want to find the employees who get higher salary than anyone in the department 5, which one of the statements is TRUE for any arbitrary employee table?a)Q1 is the correct queryb)Q2 is the correct queryc)Both Q1 and Q2 produce the same answerd)Neither Q1 nor Q2 is the correct queryCorrect answer is option 'B'. Can you explain this answer?
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Consider the table employee(empId, name, department, salary) and the two queries Q1 ,Q2 below. Assuming that department 5 has more than one employee, and we want to find the employees who get higher salary than anyone in the department 5, which one of the statements is TRUE for any arbitrary employee table?a)Q1 is the correct queryb)Q2 is the correct queryc)Both Q1 and Q2 produce the same answerd)Neither Q1 nor Q2 is the correct queryCorrect answer is option 'B'. 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 Consider the table employee(empId, name, department, salary) and the two queries Q1 ,Q2 below. Assuming that department 5 has more than one employee, and we want to find the employees who get higher salary than anyone in the department 5, which one of the statements is TRUE for any arbitrary employee table?a)Q1 is the correct queryb)Q2 is the correct queryc)Both Q1 and Q2 produce the same answerd)Neither Q1 nor Q2 is the correct queryCorrect answer is option 'B'. 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 Consider the table employee(empId, name, department, salary) and the two queries Q1 ,Q2 below. Assuming that department 5 has more than one employee, and we want to find the employees who get higher salary than anyone in the department 5, which one of the statements is TRUE for any arbitrary employee table?a)Q1 is the correct queryb)Q2 is the correct queryc)Both Q1 and Q2 produce the same answerd)Neither Q1 nor Q2 is the correct queryCorrect answer is option 'B'. Can you explain this answer?.
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