sql - 如何在标准 SQL 中进行 PIVOT 和 COUNT

Question

我想在标准 SQL 中对以下数据进行透视和计数(使用 Google 附加 OWOX BI 和 Big Query):

使其以标准sql输出如下:

所以我想根据“原因”选择 itemsku 和枢纽。

不太明白，谢谢!!!

Answer 1

以下适用于 BigQuery 标准 SQL

#standardSQL
SELECT itemsku,
       COUNTIF(reason = 'BIG') AS big,
       COUNTIF(reason = 'NONE') AS none,
       COUNTIF(reason = 'SMALL') AS small
FROM `project.dataset.table`
GROUP BY itemsku

您可以使用问题中的虚拟数据来测试、玩上面的内容，如下所示

#standardSQL
WITH `project.dataset.table` AS (
  SELECT 1010101 itemsku, 'BIG' reason UNION ALL
  SELECT 1010101, 'BIG' UNION ALL
  SELECT 13333, 'NONE' UNION ALL
  SELECT 13333, 'NONE' UNION ALL
  SELECT 14444, 'NONE' UNION ALL
  SELECT 14444, 'NONE' UNION ALL
  SELECT 14444, 'SMALL' 
)
SELECT itemsku,
       COUNTIF(reason = 'BIG') AS big,
       COUNTIF(reason = 'NONE') AS none,
       COUNTIF(reason = 'SMALL') AS small
FROM `project.dataset.table`
GROUP BY itemsku
-- ORDER BY itemsku     

结果为

Row     itemsku     big     none    small    
1       13333       0       2       0    
2       14444       0       2       1    
3       1010101     2       0       0