SELECT DISTINCT行

Question

I am trying to output each of the rows by the value driver_profileId.

Currently this only outputs one value to the page. I am expecting a list of all the unique values in the cell.

Why is this not outputting more than one row?

$query = "SELECT DISTINCT(driver_profileId) FROM driver_profiles";
$result = mysqli_query($conn, $query)or die(mysqli_error($conn));
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
foreach ($row as $key) {
    echo $key;      
}

Answer 1

I believe your issue is because you're only fetching one row . Try something more like this:

while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    echo $row['driver_profileId'];
}

This will keep fetching rows until there are no more in the result set. See the manual page for mysqli_fetch_array :

Returns an array that corresponds to the fetched row or NULL if there are no more rows for the resultset represented by the result parameter.