mysqli_query - return values

Question

I am using the PHP function mysqli_query to run a SELECT query.

What does mysqli_query return if the query runs successfully, but

Answer 1

if ($result = $mysqli->query("SELECT * FROM data"))
{
    $count = $result->num_rows; 
    printf("Result set has %d rows.\n", $count);
    $result->close();
}

From reference:

Returns FALSE on failure. For successful SELECT, SHOW, DESCRIBE or EXPLAIN queries mysqli_query() will return a mysqli_result object. For other successful queries mysqli_query() will return TRUE.