Final answer:
It is true that a Cartesian join occurs when a joining condition is not included in the WHERE clause of a SELECT statement, resulting in a Cartesian product of the involved tables.
Step-by-step explanation:
A Cartesian join, also known as a cross join, can indeed be created by not including a joining condition in the WHERE clause of a SELECT statement. This is true. When you perform a SELECT statement that involves multiple tables without specifying a join condition, each row from the first table is combined with each row from the second table. This results in a Cartesian product of the two tables, which can generate a very large number of rows, especially if both tables have a significant amount of data.
A Cartesian join, also known as a cross join, is a type of join operation in relational databases where all possible combinations of rows from the two tables are included in the result set. The join condition is not specified in the WHERE clause, but instead, it combines every row from the first table with every row from the second table.
In SQL, to create a Cartesian join, you can use the CROSS JOIN keyword or omit the join condition in the WHERE clause. Here's an example:
SELECT * FROM table1 CROSS JOIN table2;
This will return a result set with the product of the number of rows in table1 and table2, which can be a large number if the tables have many rows.