Regex_Extract Bigquery

Question

I'm trying to get the first, second, or third value of a string in bigquery using the regex_extract function.

The string looks like this

"testimage International,testimageinternational,002533336564114VoIdiAA"

I've been googling around and i'm struggling to get an appropriate regex function.

This is the closest I've gotten REGEXP_EXTRACT(string, r'[^,]+1') as x

However although it works great if the string is test,test1,test2 it doesn't work on the actual string. Any explanation of where i'm going wrong would be super appreciated.

Answer 1

Below is for BigQuery Standard SQL

Based on example in your question and suggested regex - I feel you might want to consider simply using SPLIT() as below

#standardSQL
WITH t AS (
  SELECT 'testimage International,testimageinternational,002533336564114VoIdiAA' str
)
SELECT 
  SPLIT(str, ',')[SAFE_OFFSET(0)] AS first, 
  SPLIT(str, ',')[SAFE_OFFSET(1)] AS second, 
  SPLIT(str, ',')[SAFE_OFFSET(2)] AS third 
FROM t   

with result

Row first                   second                  third    
1   testimage International testimageinternational  002533336564114VoIdiAA