What are the potential pitfalls of using INNER JOIN versus RIGHT JOIN in PHP MySQL queries?

When using INNER JOIN in PHP MySQL queries, the potential pitfall is that it will only return rows where there is a match in both tables being joined. This means that if there are unmatched rows in the right table, they will not be included in the result set. To solve this issue, you can use RIGHT JOIN instead, which will return all rows from the right table and the matched rows from the left table. 

$query = "SELECT * FROM table1 RIGHT JOIN table2 ON table1.id = table2.id";
$result = mysqli_query($connection, $query);

if(mysqli_num_rows($result) > 0){
    while($row = mysqli_fetch_assoc($result)){
        // Process the data
    }
} else {
    echo "No results found.";
}

Keywords

INNER JOIN RIGHT JOIN PHP MySQL queries

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