Topic 11330 min readStructured Tutorial
SQL Server CROSS JOIN Tutorial
Quick Answer
In SQL Server, a CROSS JOIN produces the Cartesian product of two tables, combining every row from the first table with every row from the second. It is useful for generating all possible combinations between two datasets.
Learning Objectives
- Understand what a CROSS JOIN is and how it works in SQL Server.
- Write SQL queries using CROSS JOIN to generate Cartesian products.
- Identify scenarios where CROSS JOIN is useful and when to avoid it.
Introduction
SQL Server supports several types of joins to combine data from multiple tables.
One of these is the CROSS JOIN, which produces the Cartesian product of two tables.
This tutorial explains how CROSS JOIN works, when to use it, and provides practical examples.
A CROSS JOIN returns every combination of rows from the joined tables.
