在 SQL (Snowflake) 中使用正则表达式从字符串中提取

Question

我有一个包含一长串文本的数据库字段：

Date: 02/03/22 Customer Price: 500 Total Price: 701.56 Paid to Date: 304.10 Confirmed: TRUE

从该字符串中提取特定数字的最佳方法是什么？例如，如何提取 'Total Price' (701.56) 和 'Paid to Date' (304.10)？我想我需要使用 REGEXP_SUBSTR 但我不是 100% 确定。例如：

select REGEXP_SUBSTR(my_field_name, 'Total Price: (SOME-REGEX)') as total_price,
select REGEXP_SUBSTR(my_field_name, 'Paid To Date: (SOME-REGEX)') as paid_to_date,
from my_table

我只需要return值，不需要前面的文字。

Answer 1

SELECT 'Date: 02/03/22 Customer Price: 500 Total Price: 701.56 Paid to Date: 304.10 Confirmed: TRUE' as a , 
REGEXP_SUBSTR(a,'Total Price: [0-9]*.[0-9]*') as total_price,
REGEXP_SUBSTR(a,'Paid to Date: [0-9]*.[0-9]*') as paid_to_date;

Answer 2

这是一种方法：

set my_string='Date: 02/03/22 Customer Price: 500 Total Price: 701.56 Paid to Date: 304.10 Confirmed: TRUE';
select REGEXP_SUBSTR($my_string, 'Total Price: (\d*.\d*)',1,1,'e') as total_price;
select REGEXP_SUBSTR($my_string, 'Paid to Date: (\d*.\d*)',1,1,'e') as paid_to_date;

结果：

701.56
304.10

在 SQL (Snowflake) 中使用正则表达式从字符串中提取

Extract from string using regex in SQL (Snowflake)

sql

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