BigQuery - 将字符串转换为数字

Question

我正在寻找 RE2 接受的正则表达式语法，将以下字符串转换为数字：

"339,840" -> 339840

“100,000 美元”-> 100000

"0.75" -> 0.75

"1" -> 1

Answer 1

以下适用于 BigQuery 标准 SQL

您可以使用cast(regexp_replace(val, r'[^\d.]', '') as numeric)

见下例

#standardSQL
with `project.dataset.table` as (
  select "339,840" val union all
  select "0,000" union all
  select "0.75" union all
  select "1" 
)
select cast(regexp_replace(val, r'[^\d.]', '') as numeric)
from `project.dataset.table`

有输出

BigQuery - 将字符串转换为数字

BigQuery - Converting string to numeric

regex

re2

google-bigquery