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MySQL CROSS JOIN Keyword


SQL CROSS JOIN Keyword

The CROSS JOIN keyword returns all records from both tables (table1 and table2).

MySQL CROSS JOIN

CROSS JOIN Syntax

SELECT column_name(s)
FROM table1
CROSS JOIN table2;

Note: CROSS JOIN can potentially return very large result-sets!


Demo Database

In this tutorial we will use the well-known Northwind sample database.

Below is a selection from the "Customers" table:

CustomerID CustomerName ContactName Address City PostalCode Country
1

Alfreds Futterkiste Maria Anders Obere Str. 57 Berlin 12209 Germany
2 Ana Trujillo Emparedados y helados Ana Trujillo Avda. de la Constitución 2222 México D.F. 05021 Mexico
3 Antonio Moreno Taquería Antonio Moreno Mataderos 2312 México D.F. 05023 Mexico

And a selection from the "Orders" table:

OrderID CustomerID EmployeeID OrderDate ShipperID
10308 2 7 1996-09-18 3
10309 37 3 1996-09-19 1
10310 77 8 1996-09-20 2


MySQL CROSS JOIN Example

The following SQL statement selects all customers, and all orders:

Example

SELECT Customers.CustomerName, Orders.OrderID
FROM Customers
CROSS JOIN Orders;
Try it Yourself »

Note: The CROSS JOIN keyword returns all matching records from both tables whether the other table matches or not. So, if there are rows in "Customers" that do not have matches in "Orders", or if there are rows in "Orders" that do not have matches in "Customers", those rows will be listed as well.

If you add a WHERE clause (if table1 and table2 has a relationship), the CROSS JOIN will produce the same result as the INNER JOIN clause:

Example

SELECT Customers.CustomerName, Orders.OrderID
FROM Customers
CROSS JOIN Orders
WHERE Customers.CustomerID=Orders.CustomerID;
Try it Yourself »