Question

Which of the following keywords can be used to join two tables that do not contain a commonly named and defined column?

a) NATURAL JOIN
b) USING
c) ON
d) CROSS JOIN

Answer 1

The keyword for joining two tables without common columns is CROSS JOIN, which creates a Cartesian product of the two tables, pairing every row from one table with every row from the other.

Step-by-step explanation:

The keyword that can be used to join two tables that do not contain a commonly named and defined column is d) CROSS JOIN. A CROSS JOIN produces a Cartesian product of the two tables, which means each row from the first table is combined with each row from the second table. The other options, like NATURAL JOIN, USING, and ON, all require the tables to have at least one column in common with the same name and compatible data types in order to make a meaningful join based on that column or columns.