In SQL, specifically running on Oracle, write the following query: \"How many st

Question

In SQL, specifically running on Oracle, write the following query: "How many students have more than one major?"

Note: This must be done with a nested query. Creation of temporary tables to solve the problem is not permitted. It must be completed in a single query statment. You may not create any tables nor can you alter the structure of the database. DO NOT insert any tables or modify any tables. The solution must be one statement. The only thing you can do is to create a single SQL query statement that uses the existing structure defined in the schema.

Based on the information provided, the correct output for the query should be 2.

Database Schema

Pertinent Table Information

I am only posting the Major, Student, and Enroll table since the other tables are not relevant for this specific problem.

MAJOR TABLE

STUDENT TABLE

ENROLL TABLE

dept(dname, numphds) course(cno, cname, dname) prof (pname, dname) section(cno, dname, sectno, pname) student(sid, sname, sex, age, gpa) major(sid, dname) enroll(sid, cno, dname, sectno, grade)

Explanation / Answer

query will be . This query will give output as 2

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