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Multiple Choice

What is the result of a CROSS JOIN between two tables?

A CROSS JOIN produces the Cartesian product of the two tables: every row from the first table paired with every row from the second. If the first table has m rows and the second has n rows, the result will have m × n rows, with each resulting row containing columns from both tables. There is no matching condition required, which is why it differs from inner joins that only include rows where a condition is met. It also isn’t simply a union of the two tables, nor a set of rows with common values—that behavior comes from other operations or joins.

A CROSS JOIN produces the Cartesian product of the two tables: every row from the first table paired with every row from the second. If the first table has m rows and the second has n rows, the result will have m × n rows, with each resulting row containing columns from both tables. There is no matching condition required, which is why it differs from inner joins that only include rows where a condition is met. It also isn’t simply a union of the two tables, nor a set of rows with common values—that behavior comes from other operations or joins.