大查询 - 字符串函数

Question

我非常新的BigQuery中的平台，我想采取以下字符串SOCKETIOEXCEPTION##APS.COM, NULLPOINTEREXCEPTION##RSJAVA.COM, CLASSCASTEEXCEPTION##MPS.COM

而得到这个结果：SOCKETIOEXCEPTION, NULLPOINTEREXCEPTION, CLASSCASTEEXCEPTION

之前##字符我想从给定的字符串分开，然后我想按数量排在像SOCKETIOEXCEPTION, NULLPOINTEREXCEPTION, CLASSCASTEEXCEPTION上述标签可用

示例数据库的详细信息

我怎样写这个查询？

Answer 1

下面是BigQuery的SQL标准

#standardSQL
SELECT SPLIT(line, '##')[OFFSET(0)] type, COUNT(1) cnt 
FROM `project.dataset.table`
GROUP BY type  

您可以测试，用样本数据上面从你的问题如下面的例子中玩

#standardSQL
WITH `project.dataset.table` AS (
  SELECT 'SOCKETIOEXCEPTION##111' line UNION ALL
  SELECT 'SOCKETIOEXCEPTION##222' UNION ALL
  SELECT 'SOCKETIOEXCEPTION##333' UNION ALL
  SELECT 'NULLPOINTEREXCEPTION##444' UNION ALL
  SELECT 'NULLPOINTEREXCEPTION##555' UNION ALL
  SELECT 'CLASSCASTEEXCEPTION##666' UNION ALL
  SELECT 'CLASSCASTEEXCEPTION##777' UNION ALL
  SELECT 'CLASSCASTEEXCEPTION##888' 
)
SELECT SPLIT(line, '##')[OFFSET(0)] type, COUNT(1) cnt 
FROM `project.dataset.table`
GROUP BY type   

有结果

Row type                    cnt  
1   SOCKETIOEXCEPTION       3    
2   NULLPOINTEREXCEPTION    2    
3   CLASSCASTEEXCEPTION     3