What is a cross join in SQL?

The SQL CROSS JOIN produces a result set which is the number of rows in the first table multiplied by the number of rows in the second table, assuming no 'where' clause is used along with CROSS JOIN. This kind of result is also called as Cartesian Product. If, WHERE clause is used with CROSS JOIN, it functions like an INNER JOIN.

SELECT table112.id,table112.bval1,table112.bval2,  
table111.id,table111.aval1  
FROM table112  
CROSS JOIN table111;  

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