Dynamic Pivot MYSQL 不完整的SQL

Question

我在一个已经工作了大约 5 周的项目上遇到了麻烦，我在此过程中发布了各种 stackoverflow 帖子，而且我几乎处于最后的障碍。

我在搜索每周总和时遇到重复数据的问题，但我似乎已经弄清楚了，但现在我的声明没有完成。 参考： Weekly Sum Dynamic Pivot MYSQL

这是一个数据。 http://sqlfiddle.com/#!9/a3610

$period = 'YEARWEEK';


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

$stmt = $pdo->prepare($sql);
$date_from = '2017-01-01';
$date_to   = '2017-10-01';
$stmt->execute([$date_from, $date_to]);
$row = $stmt->fetch();
$stmt->closeCursor();
$pivot_columns = $row['pivot_columns'];

$sql = "
    SELECT title AS `Service`, {$pivot_columns}
    from record_offering t1
    join setting_service ON t1.service_id = setting_service.id
    WHERE t1.date BETWEEN ? AND ?
    GROUP BY title asc WITH ROLLUP
";

$stmt = $pdo->prepare($sql);
$stmt->execute([$date_from, $date_to]);
$results = $stmt->fetchAll();
$stmt->closeCursor();

如你所见，最后一条语句是不完整的：

SELECT title AS `Service`, SUM(CASE WHEN (YEARWEEK(date)) = 201635 THEN AMOUNT else 0 END) AS `201635`,
SUM(CASE WHEN (YEARWEEK(date)) = 201703 THEN AMOUNT else 0 END) AS `201703`,
SUM(CASE WHEN (YEARWEEK(date)) = 201709 THEN AMOUNT else 0 END) AS `201709`,
SUM(CASE WHEN (YEARWEEK(date)) = 201713 THEN AMOUNT else 0 END) AS `201713`,
SUM(CASE WHEN (YEARWEEK(date)) = 201715 THEN AMOUNT else 0 END) AS `201715`,
SUM(CASE WHEN (YEARWEEK(date)) = 201717 THEN AMOUNT else 0 END) AS `201717`,
SUM(CASE WHEN (YEARWEEK(date)) = 201718 THEN AMOUNT else 0 END) AS `201718`,
SUM(CASE WHEN (YEARWEEK(date)) = 201722 THEN AMOUNT else 0 END) AS `201722`,
SUM(CASE WHEN (YEARWEEK(date)) = 201723 THEN AMOUNT else 0 END) AS `201723`,
SUM(CASE WHEN (YEARWEEK(date)) = 201725 THEN AMOUNT else 0 END) AS `201725`,
SUM(CASE WHEN (YEARWEEK(date)) = 201726 THEN AMOUNT else 0 END) AS `201726`,
SUM(CASE WHEN (YEARWEEK(date)) = 201735 THEN AMOUNT else 0 END) AS `201735`,
SUM(CASE WHEN (YEARWEEK(date)) = 201736 THEN AMOUNT else 0 END) AS `201736`,
SUM(CASE WHEN (YEARWEEK(date)) = 201
from record_offering t1
join setting_service ON t1.service_id = setting_service.id
WHERE t1.`date` BETWEEN ? AND ?
GROUP BY title asc WITH ROLLUP

我尝试过以各种方式转义查询，但要么查询完成，我的数据被复制，要么根本无法编译。

Answer 1

GROUP_CONCAT 限制为 1024 个字节。

使用

SET SESSION group_concat_max_len = @@max_allowed_packet

在 GROUP_CONCAT 查询之前。

Answer 2

在我看来，这个（或类似的东西）是解决这个问题所需的全部 sql。 其他的一切都可以而且应该在表示层中处理。

SELECT YEARWEEK(x.date) yw
     , x.title
     , COALESCE(SUM(y.amount),0) total
  FROM setting_service x
  LEFT
  JOIN record_offering y
    ON y.service_id = x.id
 GROUP 
    BY yw
     , x.id;