google bigquery将每个字符串的计数放入一个表中

Question

我们想查询此表：

Row bucket  action  count    
1   1407974 aaaaaa  15   
2   1407974 bbbbbb  67   
3   1407369 aaaaaa  89   
4   1407369 bbbbbb  501      

到这个输出：

Row bucket  actionA actionB  
1   1407974 15      67   
3   1407369 89      501      

使用google bigquery查询的最便宜的方法是什么？

Answer 1

SELECT 
  bucket, MAX(actionA) actionA, MAX(actionB) actionB
FROM (
  SELECT 
    bucket,
    CASE WHEN REGEXP_MATCH(action, 'aaaaaa') THEN count END actionA, 
    CASE WHEN REGEXP_MATCH(action, 'bbbbbb') THEN count END actionB
  FROM [tmp.a]
) GROUP BY bucket