Oracle Database Interview Question:

How To Define and Use Table Alias Names in Oracle?

Submitted by: Administrator

When column names need to be prefixed with table names, you can define table alias name and use them to prefix column names as shown in the following select statement:

SQL> SELECT e.first_name, e.last_name, d.department_name
FROM employees e INNER JOIN departments d
ON e.department_id=d.department_id;
<pre>FIRST_NAME LAST_NAME DEPARTMENT_NAME
-------------------- -------------------- ---------------
Steven King Executive
Neena Kochhar Executive
Lex De Haan Executive
Alexander Hunold IT
Bruce Ernst IT
David Austin IT
Valli Pataballa IT</pre>
Submitted by: Administrator