看一下这个:使用 bigquery 将字符串拆分为多列 https://stackoverflow.com/questions/22154275/split-string-into-multiple-columns-with-bigquery/22166014#22166014。
在他们的例子中,它是由空格分隔的。将 \s 替换为 ','
就像是:
SELECT
Regexp_extract(StringToParse,r'^*{(?:[^,]*,){0}(\d+(?:(?:PQ)|(?:KL))+\d+)\s?') as Word0,
Regexp_extract(StringToParse,r'^*{(?:[^,]*,){1}(\d+(?:(?:PQ)|(?:KL))+\d+)\s?') as Word1,
Regexp_extract(StringToParse,r'^*{(?:[^,]*,){2}(\d+(?:(?:PQ)|(?:KL))+\d+)\s?') as Word2,
Regexp_extract(StringToParse,r'^*{(?:[^,]*,){3}(\d+(?:(?:PQ)|(?:KL))+\d+)\s?') as Word3,
FROM
(SELECT 'bla{1234PQ5,6789KL0,1234PQ5,6789KL0,123' as StringToParse)