问BigQuery选择多个键值

EN

#standardSQL
SELECT
  (SELECT param.value.string_value
   FROM UNNEST(event_dim.params) AS param
   WHERE param.key = 'firebase_event_origin') AS firebase_event_origin,
  (SELECT param.value.int_value
   FROM UNNEST(event_dim.params) AS param
   WHERE param.key = 'firebase_screen_id') AS firebase_screen_id
FROM `your_dataset.your_table_*`
CROSS JOIN UNNEST(event_dim) AS event_dim
WHERE _TABLE_SUFFIX BETWEEN '20170501' AND '20170503' AND
  event_dim.name = 'control_reading';