使用 BigQuery 按月检索 AVG Temp？

Question

使用fh-bigquery:weather_gsod 数据集，我想检索特定国家/地区所有站点的一些月度天气数据。即，我想要从 1929 年至今的每月平均温度、每月平均最高温度和每月平均最低温度。

这是我为从一张表中检索所需内容而写的，2015 年。我得到的数据似乎是正确的：

SELECT stn, FIRST(name) AS station_name, mo, (AVG(temp)-32)*0.5556 AS temp, (AVG(max)-32)*0.5556 AS max, (AVG(min)-32)*0.5556 AS min
FROM [fh-bigquery:weather_gsod.gsod2015] gsod
JOIN [fh-bigquery:weather_gsod.stations2] stations
ON gsod.wban=stations.wban AND gsod.stn=stations.usaf
WHERE country='SA' 
GROUP BY stn, mo
ORDER BY mo

假设这个查询确实检索到了我需要的信息，我该如何重写它以包含整个范围（1929 到 2016）？

Answer 1

您应该使用Table wildcard functions，如下所示

SELECT 
  stn, 
  FIRST(name) AS station_name, 
  mo, 
  (AVG(temp)-32)*0.5556 AS temp, 
  (AVG(max)-32)*0.5556 AS max, 
  (AVG(min)-32)*0.5556 AS min
FROM (
  SELECT * FROM
  (TABLE_QUERY([fh-bigquery:weather_gsod], 'table_id CONTAINS "gsod"')) 
) gsod
JOIN [fh-bigquery:weather_gsod.stations2] stations
ON gsod.wban=stations.wban AND gsod.stn=stations.usaf
WHERE country='SA' 
GROUP BY stn, mo
ORDER BY mo