Question

A table alias can be assigned in the FROM clause, even when tables are being joined using the NATURAL JOIN keywords.

a) True
b) False

Answer 1

The statement that a table alias can be assigned in the FROM clause when tables are being joined using NATURAL JOIN is true. Aliases help to shorten or clarify table names in complex queries.

Step-by-step explanation:

The question asks whether a table alias can be assigned in the FROM clause while using NATURAL JOIN. The answer is True. In SQL, table aliases are often used to shorten or clarify table names in queries. These aliases become especially helpful when dealing with multiple tables in a join, including natural joins. An alias is typically created by placing a short name or identifier next to the table name in the FROM clause. This makes the query easier to read and write, especially when referencing columns in the WHERE, GROUP BY, ORDER BY, or SELECT clauses.

For example, in a natural join, you can use aliases as follows:

SELECT a.column1, b.column2
FROM table1 AS a
NATURAL JOIN table2 AS b;

This SQL query demonstrates assigning aliases 'a' to 'table1' and 'b' to 'table2' respectively, allowing for an easier reference of column names when required.