BigQuery数组的STRING到INT数组 [英] Bigquery array of STRINGs to array of INTs

问题描述

我试图从一个列中获取 BigQuery 标准SQL中的 INT64 长字符串以逗号分隔（例如， 2013,1625,1297,7634 ）。我可以通过以下方式轻松获取一组字符串：

  SELECT 
 SPLIT（string_col，，）
 FROM 
 table 
  

但是，我想返回一个 INT64 s，不是一个字符串数组。我怎样才能做到这一点？我已经尝试了

  CAST（SPLIT（string_col，，）AS ARRAY< INT64>）
  code> 

但这并不奏效。 div>

下面是针对BigQuery标准SQL的内容


$ b

  #standardSQL 
 WITH yourTable AS（
 SELECT 1 AS id，'2013,1625,1297,7634'AS string_col UNION ALL 
 SELECT 2，'1,2,3,4,5' 
）
 SELECT ID，
（SELECT ARRAY_AGG（CAST（num AS INT64））
 FROM UNNEST（SPLIT（string_col））AS num 
）AS num，
 ARRAY（SELECT CAST（num AS INT64）
 FROM UNNEST（SPLIT（string_col））AS num 
）AS num_2 
 FROM yourTable 
  




I'm trying to pull an array of INT64 s in BigQuery standard SQL from a column which is a long string of numbers separated by commas (for example, 2013,1625,1297,7634). I can pull an array of strings easily with:

SELECT
  SPLIT(string_col,",")
FROM
  table

However, I want to return an array of INT64 s, not an array of strings. How can I do that? I've tried

CAST(SPLIT(string_col,",") AS ARRAY<INT64>) 

but that doesn't work.

解决方案

Below is for BigQuery Standard SQL

#standardSQL
WITH yourTable AS (
  SELECT 1 AS id, '2013,1625,1297,7634' AS string_col UNION ALL
  SELECT 2, '1,2,3,4,5'
)
SELECT id, 
  (SELECT ARRAY_AGG(CAST(num AS INT64)) 
    FROM UNNEST(SPLIT(string_col)) AS num
  ) AS num,
  ARRAY(SELECT CAST(num AS INT64) 
    FROM UNNEST(SPLIT(string_col)) AS num
  ) AS num_2
FROM yourTable

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