Text analysis with SQL Regex syntax. Part 2

226. Regex syntax. Part 2

Let’s continue reviewing all special regex characters.

Parentheses

Parentheses in regex define a group of characters. For example, (gmail) will match a string that contains gmail. I know what you’re thinking: “Hold on a sec, isn’t it exactly what a normal regex would do?” 🤔

Yes, buuuut groups allow us to apply other special characters too them: (gmail)? will stand for 0 or no “gmail”.

Groups are extremely useful, they allow us to target multiple search patterns within a single regex. For example, with the regex (foo)(bar) we can manipulate both...

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