Oracle Database Interview Question:

How To Write an Inner Join with the WHERE Clause in Oracle?

Submitted by: Administrator

If you don't want to use the INNER JOIN ... ON clause to write an inner join, you can put the join condition in the WHERE clause as shown in the following query example:

SQL> SELECT d.department_name, e.first_name, e.last_name
2 FROM departments d, employees e
3 WHERE d.manager_id = e.employee_id;
<pre>DEPARTMENT_NAME FIRST_NAME LAST_NAME
-------------------- -------------------- --------------
Administration Jennifer Whalen
Marketing Michael Hartstein
Purchasing Den Raphaely
Human Resources Susan Mavris
Shipping Adam Fripp
IT Alexander Hunold
......</pre>
Submitted by: Administrator