Text analysis with SQL Regex functions

232. Regex functions

Let’s compile a list of functions in SQL that work with regular expressions. So far, we’ve been focusing mainly on filtering records with regular expressions, but there’re 2 more applications we need to learn – text extraction and modification.

regexp_matches(text_input, regex)

The regexp_matches() function returns an array of all captured substrings (the whole string that matched the regex OR multiple matched patterns from capturing groups ()).

It’s a very useful function for debugging regular expressions and for text extraction as well. Let’s...

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