What are some common pitfalls when trying to output results from linked tables in PHP using INNER JOIN?

One common pitfall when outputting results from linked tables in PHP using INNER JOIN is not properly aliasing columns with the same name from different tables. To solve this issue, you can assign unique aliases to columns in the SELECT statement to avoid ambiguity. 

$query = "SELECT table1.column1 AS column1_table1, table2.column1 AS column1_table2
          FROM table1
          INNER JOIN table2 ON table1.id = table2.id";

$result = mysqli_query($connection, $query);

if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo $row['column1_table1'] . " - " . $row['column1_table2'] . "<br>";
    }
}

Keywords

PHP INNER JOIN linked tables SQL database operations

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