What are the differences between using ON and USING in JOIN statements in PHP queries?

When joining tables in PHP queries, the difference between using ON and USING lies in how the join condition is specified. ON is used to specify a condition that relates columns from the two tables being joined, while USING is used when the join condition is based on columns with the same name in both tables. The choice between ON and USING depends on the specific requirements of the join operation.

// Using ON in a JOIN statement
$query = "SELECT * FROM table1 
          JOIN table2 ON table1.id = table2.id";

// Using USING in a JOIN statement
$query = "SELECT * FROM table1 
          JOIN table2 USING (id)";