BigQuery - 提取文本和潜台词

Question

我在 BigQuery 中有一个关于每天发出的合同数量的 table：

date        contract
2014-05-04  {jeans = 5, caps = 12, CDs = 1, Microwaves = 7, other = 6}
2014-05-05  {cups = 7, other = 5}

我需要归档发送了多少未分类的合同（=其他）。到目前为止，我通过下载 CSV 并在 Excel.

中计算出来来做到这一点

我怎样才能像这样进入 BQ a table:

date        other_contracts
2014-05-04   6
2014-05-05   5

谢谢！

Answer 1

使用 regexp_extract 并查找数字序列...

SELECT
  *,
  REGEXP_EXTRACT(contract,r'other = (\d+)') AS Other
FROM (
  SELECT
    "2014-05-04" AS Date,
    "{jeans = 5, caps = 12, CDs = 1, Microwaves = 7, other = 6}" AS contract),
  (
  SELECT
    "2014-05-05" AS Date,
    "{cups = 7, other = 5}" AS contract)

Answer 2

如果可以把第一个table中的数据格式改成JSON，那么就可以用https://cloud.google.com/bigquery/query-reference?hl=en#jsonfunctions

Answer 3

更通用的方法。我认为会有帮助：

SELECT 
  Date,
  INTEGER(REGEXP_EXTRACT(Item, r'(\d+)')) AS Count,
  REGEXP_EXTRACT(Item, r'(\w+)') AS Item
FROM (
  SELECT Date, SPLIT(contract) as Item
  FROM 
    (SELECT "2014-05-04" AS Date, "{jeans = 5, caps = 12, CDs = 1, Microwaves = 7, other = 6}" AS contract),
    (SELECT "2014-05-05" AS Date, "{cups = 7, other = 5}" AS contract)
)
ORDER BY Date, Count DESC

结果是：

Date    Count   Item
5/4/2014    12  caps
5/4/2014    7   Microwaves
5/4/2014    6   other
5/4/2014    5   jeans
5/4/2014    1   CDs
5/5/2014    7   cups
5/5/2014    5   other

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