can i join 3 tables in sql code example
Example 1: join three tables 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.
Example 2: 3 joins in sql
SELECT e.FIRST_NAME ,
d.DEPARTMENT_NAME ,
l.CITY ,
c.COUNTRY_NAME ,
r.REGION_NAME
FROM EMPLOYEES e
INNER JOIN DEPARTMENTS d on e.DEPARTMENT_ID = d.DEPARTMENT_ID
INNER JOIN LOCATIONS l on l.LOCATION_ID = d.LOCATION_ID
INNER JOIN COUNTRIES c on l.COUNTRY_ID = c.COUNTRY_ID
INNER JOIN REGIONS r on c.REGION_ID = r.REGION_ID ;