MySQL?? PHP? ? ?? ??
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??? ??? ?? ?? MySQL ???? ?? ?? ??? ???? ?? ???? ???? MySQL ???? ?? ??? ? ????. ? ??. ? ?? ??? ?? ? ??? ?? ??? ?? ??? ??? ?????.
SELECT SUM(column_name) FROM table_name;
PDO ???
PDO ?????(??)? ???? PHP ??????? ?? ? ?? ???? ?? mysql_query), ?? ?? ??? ?? ???? ??? ?????. sum:
$stmt = $handler->prepare('SELECT SUM(value) AS value_sum FROM codes');
$stmt->execute();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$sum = $row['value_sum'];
mysqli ??
mysqli ??? ???? ?? ? ??? ??? ?? ??? ? ????.
$result = mysqli_query($conn, 'SELECT SUM(value) AS value_sum FROM codes'); $row = mysqli_fetch_assoc($result); $sum = $row['value_sum'];
? ??? PHP? ???? MySQL ????? ?? ??? ????? ????? ??? ?? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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