Notes
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@DeptID int
AS
SELECT * FROM Instructor WHERE DepartmentId = @DeptID
Exec InstructorsByDepartment @DeptID = 5
2.create procedure StudentNamesByCourseID @CourseId int
AS
SELECT Name from Student
Full Join Course
On Student.StudentId = Course.StudentId
Where CourseId = @CourseId
Exec StudentNamesByCourseID @CourseID = 3
3.create procedure StudentNumbersByCourseID2
@CourseId int
AS
BEGIN
If(@CourseId IS NULL)
RETURN 0
if(SELECT COUNT(StudentId) AS NumberOfStudents from Course Where CourseId = @CourseId Group by StudentId) > 0
begin
SELECT COUNT(StudentId) AS NumberOfStudents from Course Where CourseId = @CourseId Group by StudentId
RETURN 1
end
else
RETURN 2
END
Declare @return_value int
exec @return_value = StudentNumbersByCourseID2 @CourseId =3
If @return_value = 0
Begin
Print 'Input not correct'
end
else if @return_value = 1
begin
print 'procedure executed successfully'
end
else if @return_value=2
begin
print 'No students assigned this course'
end
go
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