# (Homework Solution): classroom(building, room number, capacity) department dept-name, building, budget)

using the above schema solve the following queries

1) Find the IDs of all students who were taught by an instructor named Einstein; make sure there are no duplicates in the result.

2) Find all instructors earning the highest salary (there may be more than one with the same salary).

3) Find the enrollment of each section that was offered in Fall 2009.

4) Find the maximum enrollment, across all sections, in Fall 2009.

5) Create a new course “CS-001”, titled “Weekly Seminar”, with 0 credits.

classroom(building, room number, capacity) department dept-name, building, budget) courselcourse id, title, deptname, credits) instructor(ID, name, dept.name, salary) section(course id, sec id, semester, year, building, roomumber, time slotid) teaches(ID, course id, sec id, semester, year) student ID, name, dept name, tot cred) takes(ID, course.id, secid, semester year, grade) advisor(S-ID, İJD) time slot(time-slot.id, day, start time, endtime) prereq course id, prereqid)

```Please comment in case of any query.

public void classroom(String building, int room_number, int capacity){
System.out.println("ClassRoom info :");
System.out.println("Building name -"+building+","+"Room No -"+room_number+","+
"Room Capacity -"+capacity);
}

public void department(String dept_name,String building, double budget){
System.out.println("Department info :");
System.out.println("Department name -"+dept_name+","+"Building name -"+building+","
+"Department Budget"+budget);
}

public void course(String course_id, String title, String dept_name, int credits){
System.out.println("Course Info :");
System.out.println("Course ID -"+course_id+","+"Title -"+title+","+"Department name -"
+dept_name+","+"Credits -"+credits);
}

public void instructor(int ID, String name, String dept_name, double salary){
System.out.println("Instructor Info :");
System.out.println("ID -"+ID+","+"Name -"+name+","+"Department name -"+dept_name+","
+"Salary"+salary);
}

public void section(int course_id, int sec_id, String semester, int year, String building,
int room_number, int time_slot_id){
System.out.println("Section info :");
System.out.println("Course ID -"+course_id+","+"Section ID -"+sec_id+","+"Semester -"
+semester+","+"Year -"+year+","+"Building -"+building+","+"Room No -"+room_number
+","+"Time Slot -"+time_slot_id);
}

public void teaches(int ID, int course_id, int sec_id, String semester, int year){
System.out.println("Instructor Teaches Info :");
System.out.println("ID -"+ID+","+"Course ID -"+course_id+","+"Section ID-"+sec_id
+","+ "Semester -"+semester+","+"Year"+year);
}

public void student(int ID, String name, String dept_name, int tot_cred){
System.out.println("Student Info :");
System.out.println("ID -"+ID+ ","+"Name -"+name+","+"Department Name -"+dept_name
+","+"Total Credits -"+tot_cred);
}

public void takes(int ID, int course_id, int sec_id, String semester, int year, char grade){
System.out.println("Takes Info :");
System.out.println("ID -"+ID+","+"Course ID -"+course_id+","+"Section ID-"+sec_id
}

public void advisor(int s_ID, int i_ID){
System.out.println("S ID -"+s_ID+","+"I ID"+i_ID);
}

public void time_slot(int time_slot_id, String day, String start_time, String end_time){
System.out.println("Time Slot Info :");
System.out.println("Time Slot ID -"+time_slot_id+","+"Day -"+day+","+"Start Time -"+","+
"End Time -"+end_time);
}

public void prereq(int course_id, int prereq_id){
System.out.println("Prerequisites :");
System.out.println("Course ID -"+course_id+","+"Prerequisition ID -"+prereq_id);
}

}```
```import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;

public class Test {

public static void main(String[] args) throws IOException{

System.out.println("Enter Instructor name");

ArrayList<Integer> students = new ArrayList<Integer>();

for (int i=0; i<students.size(); i++){
while(inst_name.equals("Einstein")){
System.out.println(students.get(i));

}
}

System.out.println("Enter the salary");

ArrayList<Double> sal = new ArrayList<Double>();

for (int j=0; j<sal.size(); j++){
if (sal.get(j) > sal.get(j+1)){
}
}

}
}```
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