提问人:Robert muriithi 提问时间:5/12/2023 最后编辑:halferRobert muriithi 更新时间:5/20/2023 访问量:145
为什么我在 BigQuery 中不断收到语法错误
Why do I keep getting a syntax error in BigQuery
问:
我似乎无法确定我做错了什么。这是我遇到的错误
运算符没有匹配的签名 = 对于参数类型:STRING, INT64 中。支持的签名:ANY = ANY at [15:8]
SELECT
station_id,
name,
number_of_rides AS number_of_rides_starting_at_station
FROM
(
SELECT
start_station_id,
COUNT(*) number_of_rides
FROM bigquery-public-data.new_york_citibike.citibike_trips
GROUP BY
start_station_id
) subquery
INNER JOIN bigquery-public-data.new_york_citibike.citibike_stations
ON station_id = subquery.start_station_id
ORDER BY
number_of_rides DESC
答:
0赞
Adrian Maxwell
5/12/2023
#1
消息“运算符没有匹配的签名 = 参数类型:STRING、INT64。支持的签名:ANY = ANY“表示 station_id 和 start_station_id 列具有不同的数据类型,一种是字符串,另一种是整数。
若要解决此问题,请将其中一列转换为另一列的数据类型。您需要弄清楚哪个是整数,哪个是字符串。例如
SELECT data_type
FROM `bigquery-public-data.new_york_citibike.INFORMATION_SCHEMA.COLUMNS`
WHERE table_name = 'citibike_stations' AND column_name = 'station_id'
我建议将整数列转换为字符串(所有整数都可以是字符串,但反之亦然)
SELECT
station_id
, name
, number_of_rides AS number_of_rides_starting_at_station
FROM (
SELECT start_station_id, COUNT(*) number_of_rides
FROM bigquery-public-data.new_york_citibike.citibike_trips
GROUP BY start_station_id
) subquery
INNER JOIN bigquery-public-data.new_york_citibike.citibike_stations
ON CAST(station_id AS STRING) = subquery.start_station_id
ORDER BY number_of_rides DESC
当然,这只是一个猜测,也可能是相反的,即:
INNER JOIN bigquery-public-data.new_york_citibike.citibike_stations
ON station_id = CAST(subquery.start_station_id AS STRING)
注意:您可以使用 safe_cast() 进行转换,但不需要它来将整数转换为字符串
评论
0赞
Robert muriithi
5/15/2023
谢谢!第二个奏效了。非常感谢
评论
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