Question

我正在尝试从INT64标准SQL中的BigQuery数组中删除一个由逗号分隔的长数字字符串的列（例如，2013,1625,1297,7634）。我可以使用以下方法轻松地拉出一串字符串：

SELECT
  SPLIT(string_col,",")
FROM
  table

但是，我想返回一个INT64的数组，而不是一个字符串数组。我怎样才能做到这一点？我试过了

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

但这不起作用。

Answer 1

以下是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

Answer 2

米哈伊尔打败了我，他的回答更为广泛，但将其作为一个更小的副本加入：

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            type="checkbox"
             formControlName="{{country.name}}"
             (change)="search(country, $event)
                    >

STRING的大数组数组到INT数组

2 个答案: