Question

I have the following function:

private static function getFixedFare($FixedFareId) {

    $pdo = new SQL();
    $dbh = $pdo->connect(Database::$serverIP, Database::$serverPort, Database::$dbName, Database::$user, Database::$pass);

    try {

        $query =   "SELECT Fare FROM tblfixedfare
                    WHERE FixedFareId = :fixed_fare_id
                    AND DayHalf = :day_half";

        $stmt = $dbh->prepare($query);

        $stmt->bindParam(':fixed_fare_id', $FixedFareId, PDO::PARAM_INT);
        $stmt->bindParam(':day_half', self::$day_half, PDO::PARAM_STR);

        $stmt->execute();

        $result = $stmt->fetch(PDO::FETCH_COLUMN);

        $stmt->closeCursor();

        $dbh = null;

        return $result;

    }

    catch (PDOException $pe) {
        die("Error: " .$pe->getMessage(). " Query: ".$stmt->queryString);
    }

}

Basically I want to change the query to do nine different selects, as follows:

        $query =   "SELECT Fare FROM tblfixedfare
                    WHERE FixedFareId = :fixed_fare_id
                    AND DayHalf = :day_half
                    AND CarType = 'Car'";

and

        $query =   "SELECT Fare FROM tblfixedfare
                    WHERE FixedFareId = :fixed_fare_id
                    AND DayHalf = :day_half
                    AND CarType = 'Est'";

and the same for all the other car types, ‘Exec’, ‘ExecEst’, ‘6B’, ‘7B’, ‘7W’, ‘8B’ and ‘Bus’ which will only ever be these car types.

I was hoping I could store each of these query results into different variables without having to do 9 different queries (reducing code). Such as a loop and then storing the results to $resultcar, $resultest and so on…

Not to sure how I would do this so any help would be much appreciated! 🙂

Answer 1

You can do an IN

SELECT CarType, Fare FROM tblfixedfare
WHERE FixedFareId = :fixed_fare_id
AND DayHalf = :day_half
AND CarType IN ('Car', 'Est' ...);

Note that you have to include the CarType in the Select so you can filter them after the query.

UPDATED: You can group your results by CarType already like this:

 $results = $stmt->fetchAll(PDO::FETCH_ASSOC|PDO::FETCH_GROUP);

The code above should give you something like:

array(
    'Car' => array(
        // data
    ),
    'Est' => array(
         // data
    )
)

If you don’t mind changing your variables, you can immediately have them in variables without looping through extract(…)

So feeding

$results = $stmt->fetchAll(PDO::FETCH_COLUMN|PDO::FETCH_GROUP);

which is the array mentioned above to extract:

extract($results, EXTR_PREFIX_ALL, 'result');

will let you have the result sets in variables already:

var_dump($result_Car);
array(2) {
    [0]=> array(1) {
        ["Fare"]=> string(1) "100"
    }
    [1]=>
    array(1) {
        ["Fare"]=> string(1) "200"
    }
}

All in all, in one line:

extract($q->fetchAll(PDO::FETCH_ASSOC|PDO::FETCH_GROUP), EXTR_PREFIX_ALL, 'result');