Junte-se a 3 tabelas no sql t1-aluno(s_id,s_name) t2-marcas(school_id,s_id,pontuação,estado) t3-detalhes(address_city,email_id,school_id) t4-saída(s_name,a pontuação,o estado,address_city,email_id)

junte-se três tabelas sql

Suppose we are having three table named as 
Student_details
Attendance_details
Batch_details
And we have to apply join these three tables for fetching records

Example query:
select column_names
from Student_detail as s join Attendance_details as a on
s.s_id = a.s_id join Batch_details as b on 
s.s_id = b.s_id;

Here in the above example we implemented simple join but you change it with own join requirements.