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create table Students ( Student_id int, Student_name varchar(100) ); create table Grades ( student_id numeric, Profession varchar(10), Grade numeric ); insert into Students(Student_id,Student_name) values (1,"avi"),(2,"david"), (3,"mosh"), (4,"adir"); insert into Grades values (2,'math',95), (3,"sport",25), (4,"english",30); insert into Grades(student_id,Profession) values (1,'math');
SELECT t.student_name FROM (SELECT s.Student_id, s.student_name , COUNT(s.Student_id) OVER (PARTITION BY Profession) no_of_std FROM Students s inner join Grades g on s.Student_id = g.Student_id) t where t.no_of_std > 1
student_name
david
avi