To answer these questions, we will use SQL (Structured Query Language), which is a standard language for managing data held in a relational database management system.

1) To find the number of instructors who teach a course in the even semester of 2016, we can use the following SQL query:

```sql
SELECT COUNT(DISTINCT id)
FROM Instructor
WHERE id IN (
SELECT id
FROM Teaches
WHERE sem = 'even' AND year = 2016
);
```

This query first selects the IDs of instructors who taught in the even semester of 2016 from the `Teaches` table. Then it counts the number of distinct IDs from the `Instructor` table, which gives us the number of instructors who taught a course in the even semester of 2016.

2) To list the instructors who are not teaching in the CE Department, we can use the following SQL query:

```sql
SELECT name
FROM Instructor
WHERE dept_name != 'CE' AND id NOT IN (
SELECT id
FROM Teaches
WHERE course_id IN (
SELECT course_id
FROM Course
WHERE dept_name = 'CE'
)
);
```

This query first selects the course IDs of courses that are in the CE department from the `Course` table. Then it selects the IDs of instructors who teach these courses from the `Teaches` table. Finally, it selects the names of instructors from the `Instructor` table who are not in the CE department and do not teach any of the CE courses.

Question

To answer these questions, we will use SQL (Structured Query Language), which is a standard language for managing data held in a relational database management system.

1) To find the number of instructors who teach a course in the even semester of 2016, we can use the following SQL query:

```sql
SELECT COUNT(DISTINCT id) 
FROM Instructor 
WHERE id IN (
    SELECT id 
    FROM Teaches 
    WHERE sem = 'even' AND year = 2016
);
```

This query first selects the IDs of instructors who taught in the even semester of 2016 from the `Teaches` table. Then it counts the number of distinct IDs from the `Instructor` table, which gives us the number of instructors who taught a course in the even semester of 2016.

2) To list the instructors who are not teaching in the CE Department, we can use the following SQL query:

```sql
SELECT name 
FROM Instructor 
WHERE dept_name != 'CE' AND id NOT IN (
    SELECT id 
    FROM Teaches 
    WHERE course_id IN (
        SELECT course_id 
        FROM Course 
        WHERE dept_name = 'CE'
    )
);
```

This query first selects the course IDs of courses that are in the CE department from the `Course` table. Then it selects the IDs of instructors who teach these courses from the `Teaches` table. Finally, it selects the names of instructors from the `Instructor` table who are not in the CE department and do not teach any of the CE courses.

Knowee AI · Accepted Answer

To answer these questions, we will use SQL (Structured Query Language), which is a standard language for managing data held in a relational database management system.

1) To find the number of instructors who teach a course in the even semester of 2016, we can use the following SQL query:

```sql
SELECT COUNT(DISTINCT id) 
FROM Instructor 
WHERE id IN (
    SELECT id 
    FROM Teaches 
    WHERE sem = 'even' AND year = 2016
);
```

This query first selects the IDs of instructors who taught in the even semester of 2016 from the `Teaches` table. Then it counts the number of distinct IDs from the `Instructor` table, which gives us the number of instructors who taught a course in the even semester of 2016.

2) To list the instructors who are not teaching in the CE Department, we can use the following SQL query:

```sql
SELECT name 
FROM Instructor 
WHERE dept_name != 'CE' AND id NOT IN (
    SELECT id 
    FROM Teaches 
    WHERE course_id IN (
        SELECT course_id 
        FROM Course 
        WHERE dept_name = 'CE'
    )
);
```

This query first selects the course IDs of courses that are in the CE department from the `Course` table. Then it selects the IDs of instructors who teach these courses from the `Teaches` table. Finally, it selects the names of instructors from the `Instructor` table who are not in the CE department and do not teach any of the CE courses.

Consider following relationsInstructor(id, name, dept_name,salary)Teaches (id,course_id,sec_id,sem(even/odd),year)1) Find the number of instructors who teach a course in even semester of 2016.2) List the instructors who ar not teaching in CE Department

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