What are the potential drawbacks of not fully qualifying field names in PHP MySQL queries?

Not fully qualifying field names in PHP MySQL queries can lead to ambiguous column references, especially when joining tables with columns that have the same name. This can result in errors or unexpected results in query execution. To avoid this issue, it is recommended to fully qualify field names by prefixing them with the table name or alias.

// Example of fully qualifying field names in a MySQL query
$sql = "SELECT table1.column1, table2.column2 FROM table1 JOIN table2 ON table1.id = table2.id";
$result = mysqli_query($connection, $sql);