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create table SCHOOL ( id int, name varchar(30), type_id int ) create table SCHOOL_STUDENT( school_id int, student_id int ) create table SCHOOL_TYPE ( id int, name varchar(30) ) insert into SCHOOL(id, name , type_id) values(1,'abc school',3) ,(2,'xyz school',4) ,(3,'HEH school',3); insert into SCHOOL_STUDENT (school_id, student_id) values(1,123),(3,123),(2,56); insert into SCHOOL_TYPE (id,name) values (1,'junior school'), (2,'tech school'), (3,'High school'), (4,'Ultra High school');
10 rows affected
select ss.student_id ,case when max(isHighSchool) = 1 and min(isHighSchool) = 1 then 'YES' else 'NO' end as isHighSchool from ( select ss.student_id--, st.name ,case when st.name = 'High school' then 1 else 0 end as isHighSchool from school_type st inner join school s on s.type_id = st.id inner join school_student ss on ss.school_id = s.id )ss group by ss.student_id
student_id
isHighSchool
56
NO
123
YES