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In this session of the interview preparatory course, we will be discussing the cross join concept in SQL. This type of join adds each row from one table with all the rows in another table, resulting in a cross-product operation. To calculate the number of rows in the result set of a cross join, simply multiply the number of rows in one table with the number of rows in the other table. For example, if one table has 7 rows and the other has 4 rows, the total number of rows in the result set would be 28 rows. It is important to note that when performing a cross join without specifying any condition, the number of rows will increase exponentially.
