In SQL, the **CROSS JOIN** is used to combine each row of the first table with each row of the second table. It is also known as the Cartesian join since it returns the Cartesian product of the sets of rows from the joined tables. 

# Syntax
There are two implementations of the `CROSS JOIN` statement:

- Using the `CROSS JOIN` syntax.
- Using the `FROM` clause without using a `WHERE` clause.

## 1. Using the `CROSS JOIN` clause

In this implementation, we specify the keyword `CROSS JOIN` in between the table names we want to join.

```sql
SELECT      [column names]
FROM        [Table1]
CROSS JOIN  [Table2]
```
## 2. Using the `FROM` clause without using a `WHERE` clause.

In this implementation we use the `FROM` keyword along with the table names; these names are separated by commas.

```sql
SELECT [column names]
FROM   [Table1], [Table2]
```
<br>

# Examples
Consider the two tables, called `employee` and `department`, below:

Executing cross join on these gives us the following output:

/*CROSS JOIN*/

SELECT * 
FROM employee 
CROSS JOIN department 

CROSSJOIN

/* FROM clause */

SELECT *
FROM employee, department

FROM

What is the SQL CROSS JOIN?

In SQL, the CROSS JOIN is used to combine each row of the first table with each row of the second table. It is also known as the Cartesian join since it returns the Cartesian product of the sets of rows from the joined tables. 

What is the SQL CROSS JOIN?

Syntax

1. Using the CROSS JOIN clause

2. Using the FROM clause without using a WHERE clause.

Examples

1. Using the `CROSS JOIN` clause

2. Using the `FROM` clause without using a `WHERE` clause.