BigQuery嵌套字段:ARRAY类型的列单位不能在SELECT DISTINCT中使用

时间:2019-01-30 13:14:37

标签: google-bigquery

我想在BigQuery中选择表的唯一行,但出现以下错误:“ ARRAY类型的列单位不能在SELECT DISTINCT中使用”。

我的查询是

SELECT DISTINCT * from <table>

表架构

  {
    "mode": "NULLABLE",
    "name": "company_name",
    "type": "STRING"
  },
  {
    "mode": "NULLABLE",
    "name": "vat_number",
    "type": "STRING"
  },
  {
    "fields": [
      {
        "mode": "NULLABLE",
        "name": "name",
        "type": "STRING"
      }
    ],
    "mode": "REPEATED",
    "name": "industry",
    "type": "RECORD"
  }

如何在BigQuery中选择带有嵌套字段的表的不同行?

1 个答案:

答案 0 :(得分:1)

您可以使用ANY_VALUE函数在GROUP BY中选择嵌套字段的值(假设该值在整个组中都是相同的):

SELECT
  company_name,
  vat_number,
  ANY_VALUE(industry) AS industry
FROM
  <table>
GROUP BY
  company_name,
  vat_number