每周总和动态数据透视MYSQL

Question

我很难在MySQL中使用Dynamic Pivots，现在已经为该项目奋斗了5周多。 使用此代码，我可以生成动态数据透视表：

if($period == "YEARWEEK"){
    $sql = "
    SELECT
      GROUP_CONCAT(DISTINCT
        CONCAT(
          'SUM(CASE WHEN (".$period."(redeem_pledge)) = ',
          (".$period."(redeem_pledge)),
          ' THEN AMOUNT else 0 END) AS `',
          (".$period."(redeem_pledge)),
          '`'
        )
      ORDER BY redeem_pledge ASC ) AS `pivot_columns`
    FROM record_pledge
    WHERE redeem_pledge BETWEEN ? AND ?
    ORDER BY redeem_pledge ASC
";
$stmt = $pdo->prepare($sql);
$date_from = $this->input->get('date_from') ? $this->input->get('date_from') : '2017-05-01';
$date_to   = $this->input->get('date_to') ? $this->input->get('date_to') : date('Y-m-d');
$stmt->execute([$date_from, $date_to]);
$row = $stmt->fetch();
$stmt->closeCursor();
$pivot_columns = $row['pivot_columns'];

$sql = "
    SELECT title AS `Pledge Purpose`, {$pivot_columns}
    from record_pledge t1
    join setting_pledge_purpose ON t1.purpose_pledge = 
    setting_pledge_purpose.id
    WHERE t1.`redeem_pledge` BETWEEN ? AND ?
    GROUP BY title asc WITH ROLLUP
    ";
    $stmt = $pdo->prepare($sql);
$stmt->execute([$date_from, $date_to]);
$results = $stmt->fetchAll();
$stmt->closeCursor();

通过传递传递给它的参数来切换$ period的值，使用此方法生成月度报告或年度报告没有问题。但是，当我使用YEARWEEK作为函数时，数据将被复制，如下所示：

传递给它的参数：

date_from=2017-06-01
date_to=2017-10-01
period=YEARWEEK

SQL FIDDLE： Here 这是拼图的最后一部分，非常感谢任何帮助!!!!!