如何在 MySQL 中使用 REGEXP 使用 SUBSTRING

Question

I have situation, where I have to substring regular expression from description using MySQL.

Descritpion:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed ac magna enim, eu adipiscing sapien. Cras lacinia vulputate elit, sed adipiscing felis interdum a. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Phasellus sit amet ante orci. D9801 Quisque dignissim posuere quam, id suscipit nisl scelerisque nec.

Where D9801 is REGEXP. Every description has different content but my reg exp should looks like: REGEXP 'D[[:digit:]]{4}'

I know the REGEXP return only true/false value, but how can I make query to return only D9801 value?

I tried something like this:

SELECT 
SUBSTRING (description, LOCATE(REGEXP 'D[[:digit:]]{4}', description), 5)
FROM (
   SELECT "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed ac magna enim, eu adipiscing sapien. Cras lacinia vulputate elit, sed adipiscing felis interdum a. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Phasellus sit amet ante orci. **D9801** Quisque dignissim posuere quam, id suscipit nisl scelerisque nec." AS description
) temp

but now I know this is totally wrong... Any help will be appreciate.

Answer 1

MySQL doesn't provide this function. But you can check out udf .

Take a close look at this function : REGEXP_SUBSTR(text, pattern [,position [,occurence [,mode]]])