Question

What happens when you create a Cartesian product?

A.All rows from one table are joined to all rows of another table
B.The table is joined to another equal table
C.All rows that do not match in the WHERE clause are displayed
D.The table is joined to itself, one column to the next column, exhausting E.all possibilities

Answer 1

Creating a Cartesian product results in a new table where each row from the first table is paired with each row from the second table, creating all possible combinations. The correct answer is A, where all rows are joined together.

Step-by-step explanation:

When you create a Cartesian product in the context of databases, you combine all rows from one table with all rows of another table. This results in a new table where each combination of rows is represented. For example, if the first table has 3 rows and the second table has 4 rows, the Cartesian product will result in a table with 12 rows (3x4).

To clarify, the correct answer to the question 'What happens when you create a Cartesian product?' is A. All rows from one table are joined to all rows of another table. This operation doesn't involve matching rows based on a condition like a normal join; instead, it pairs each row of the first table with every row of the second table, thereby exhausting all possibilities.

Regarding the information on the provided tables, it is not relevant to this specific question about Cartesian products. However, data grouping can be significant when organizing and analyzing data, and the way data is grouped can affect the usability and understanding of that data.