动态数据透视表问题

Question

我的查询存在一些问题，因为它会在指定的日期之间生成所需的数据（实时显示为2个日期字段（date_from和date_to），但是数据顺序错误，例如，它将出现

JAN 2017 | MARCH 2017 | APRIL 2017 | FEB 2017

最令人困惑的问题是，它会在您搜索的内容之外生成数据。 例如，如果您搜索的日期是2017年1月1日，则它将12月添加到数据中，但是数据库中没有包含12月记录的数据。

用于生成动态数据透视图的代码为：

$sql = "
    SELECT
      GROUP_CONCAT(DISTINCT
        CONCAT(
          'SUM(CASE WHEN EXTRACT(".$period." FROM redeem_pledge) = ',
          EXTRACT(".$period." FROM redeem_pledge),
          ' THEN AMOUNT else 0 END) AS `',
          EXTRACT(".$period." FROM redeem_pledge),
          '`'
        )
      ) 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();

已添加数据和未组织数据的图像：

SQL-SEARCH的更新回显从01-01-2017（JAN）-15-10-2017（OCT）：

SELECT title AS `Pledge Purpose`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201701 THEN AMOUNT else 0 END) AS `201701`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201702 THEN AMOUNT else 0 END) AS `201702`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201704 THEN AMOUNT else 0 END) AS `201704`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201705 THEN AMOUNT else 0 END) AS `201705`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201706 THEN AMOUNT else 0 END) AS `201706`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201708 THEN AMOUNT else 0 END) AS `201708`,
SUM(CASE WHEN EXTRACT(YEAR_MONTH FROM redeem_pledge) = 201709 THEN AMOUNT else 0 END) AS `201709` 
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

Answer 1

您需要将ORDER BY选项放在GROUP_CONCAT函数中，而不是SELECT查询中。

另外，您需要将引号括在EXTRACT($period FROM redeem_pledge)返回的值周围。 如果$period是一个返回日期的多个部分的单位，例如YEAR_MONTH ，则需要将其作为字符串进行比较，因为它将是2017-01 ； 如果您不引用它，它将被视为数字减法。

$sql = "
    SELECT
      GROUP_CONCAT(DISTINCT
        CONCAT(
          'SUM(CASE WHEN EXTRACT(".$period." FROM redeem_pledge) = \"',
          EXTRACT(".$period." FROM redeem_pledge),
          '\" THEN AMOUNT else 0 END) AS `',
          EXTRACT(".$period." FROM redeem_pledge),
          '`'
        )
      ORDER BY redeem_pledge ASC) AS `pivot_columns`
    FROM record_pledge
    WHERE redeem_pledge BETWEEN ? AND ?

";