For the following tables and a query:Student (studentId, studentName, address) Result (studentId, subjectId, score) Subject (subjectId, subjectName) Which code snippet will display students with the highest 'SQL Basics' test scores?SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId =(SELECT ss.subjectId FROM dbo.Subject ssWHERE ss.subjectName = 'SQL Basics');SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectName = 'SQL Basics'ORDER BY score DESC;SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId = 'SQL Basics'ORDER BY score DESC;SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId =(SELECT ss.subjectId FROM dbo.Subject ssWHERE ss.subjectName = 'SQL Basics')ORDER BY score DESC;
Question
For the following tables and a query:Student (studentId, studentName, address) Result (studentId, subjectId, score) Subject (subjectId, subjectName) Which code snippet will display students with the highest 'SQL Basics' test scores?SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId =(SELECT ss.subjectId FROM dbo.Subject ssWHERE ss.subjectName = 'SQL Basics');SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectName = 'SQL Basics'ORDER BY score DESC;SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId = 'SQL Basics'ORDER BY score DESC;SELECT TOP 1 WITH TIES s.*FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentIdWHERE r.subjectId =(SELECT ss.subjectId FROM dbo.Subject ssWHERE ss.subjectName = 'SQL Basics')ORDER BY score DESC;
Solution
The correct code snippet that will display students with the highest 'SQL Basics' test scores is:
SELECT TOP 1 WITH TIES s.* FROM STUDENT s JOIN RESULT r ON s.studentId = r.studentId WHERE r.subjectId = (SELECT ss.subjectId FROM dbo.Subject ss WHERE ss.subjectName = 'SQL Basics') ORDER BY score DESC;
This query works by first joining the Student and Result tables on the studentId. It then filters the results to only include rows where the subjectId matches the subjectId of 'SQL Basics' in the Subject table. Finally, it orders the results by score in descending order and selects the top result. If there are ties for the highest score, it will return all of them due to the WITH TIES clause.
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