小编Flo*_*ent的帖子

我想透视字段“ unitId”，“ firebase_screen_class”，以便每个字段都出现在单独的列中：

SELECT
  event.name,
  event_param.value.string_value AS ad_unit,
  COUNT(*) AS event_count
FROM
  `app_events_20170510`, 
  UNNEST(event_dim) AS event, 
  UNNEST(event.params) as event_param
WHERE
  event.name in ('Ad_requested', 'Ad_clicked', 'Ad_shown')
  and event_param.key in ('unitId', 'screen_class')
GROUP BY 1,2

我已使用旧版SQL使用以下查询，但未显示正确的聚合结果：

SELECT event_name, ad_unit, count(*) FROM
(
SELECT
  event_dim.name as event_name,
  MAX(IF(event_dim.params.key = "firebase_screen_class", event_dim.params.value.string_value, NULL)) WITHIN RECORD as firebase_screen_class,
  MAX(IF(event_dim.params.key = "unitId", event_dim.params.value.string_value, NULL)) WITHIN RECORD as ad_unit
FROM
  [app_events_20170510]
WHERE
  event_dim.name in ('Ad_requested','Ad_shown', 'Ad_clicked')
  and event_dim.params.key in ('unitId','screen_class')
)
group by 1,2

我正在寻找以下输出：

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