In Intellij, how do I toggle between camel case and underscore spaced?

Question

At my company we have two different style guides for java vs sql. In java I have a field named historyOfPresentIllness and when i write the sql, I want to name it

Answer 1

Very simple press Clr + F to open Find/Replace panel and check [✓] Regex copy past regex

Find: [_]{1,1}([a-z])

Replace: \U$1

Press [Replace all] button, Enjoy

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Thanks @piotrek for _some_awe_var to _someAweVar

Use Find: (\w)[_]{1,1}([a-z])
Replace: $1\U$2