Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Consider the following relations:Student(ID, ...
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Consider the following relations:
Student(ID, course, sec, semester, year)
Teacher(TID, course, sec, semester, year, salary)
What is the query to find the total number of (distinct) students who have taken courses taught by the instructor with ID 100?
- a)select distinct IDfrom Studentwhere (course, sec, semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);
- b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;
- c)select count (distinct ID)from Studentwhere (course, sec, semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);
- d)select course, sec, semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Consider the following relations:Student(ID, course, sec, semester, ye...
The correct answer is option 3 i.e.
select count (distinct ID)
from Student
where (course, sec, semester, year) in (select course, sec, semester, year
from Teacher where Teacher.TID= 100);
The IN operator is used when you want to compare a column with more than one value. It is similar to an OR condition.
Most Upvoted Answer
Consider the following relations:Student(ID, course, sec, semester, ye...
Explanation:
Student(ID, course, sec, semester, year)
Teacher(TID, course, sec, semester, year, salary)
Query Explanation:
- The query is looking for the total number of distinct students who have taken courses taught by the instructor with ID 100.
- We need to find the count of distinct student IDs who have taken courses taught by the instructor with ID 100.
Query breakdown:
- The subquery retrieves the course, sec, semester, and year from the Teacher table where the TID is 100.
- The main query then selects the distinct IDs of students who have taken courses with the same course, sec, semester, and year as taught by the instructor with ID 100.
- Finally, the count function is used to find the total number of distinct student IDs that match the criteria.
Therefore, the correct query to find the total number of distinct students who have taken courses taught by the instructor with ID 100 is:
select count(distinct ID)
from Student
where (course, sec, semester, year) in
(select course, sec, semester, year
from Teacher
where Teacher.TID= 100);
Student(ID, course, sec, semester, year)
Teacher(TID, course, sec, semester, year, salary)
Query Explanation:
- The query is looking for the total number of distinct students who have taken courses taught by the instructor with ID 100.
- We need to find the count of distinct student IDs who have taken courses taught by the instructor with ID 100.
Query breakdown:
- The subquery retrieves the course, sec, semester, and year from the Teacher table where the TID is 100.
- The main query then selects the distinct IDs of students who have taken courses with the same course, sec, semester, and year as taught by the instructor with ID 100.
- Finally, the count function is used to find the total number of distinct student IDs that match the criteria.
Therefore, the correct query to find the total number of distinct students who have taken courses taught by the instructor with ID 100 is:
select count(distinct ID)
from Student
where (course, sec, semester, year) in
(select course, sec, semester, year
from Teacher
where Teacher.TID= 100);
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Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer?
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Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);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 Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);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 Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer?.
Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);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 Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);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 Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer?.
Solutions for Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
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Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Consider the following relations:Student(ID, course, sec, semester, year)Teacher(TID, course, sec, semester, year, salary)What is the query tofind the total number of (distinct) students who have taken coursestaught by the instructor with ID 100?a)select distinct IDfrom Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);b)select course, sec, semester, yearfrom Teacher where Teacher.TID= 100;c)select count (distinct ID)from Studentwhere (course, sec,semester, year) in (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);d)selectcourse, sec,semester, yearfrom Student where (select course, sec, semester, yearfrom Teacher where Teacher.TID= 100);Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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