Meta character for 'Inverse' and 'or' in this certain problem using Regular Expression

Question

Problem: Query the list of CITY names from STATION that
either do not start with vowels or do not end with vowels.
Your result cannot contain duplicates.

In Oracle use REGEXP_LIKE function:

This solution works fine but I want to solve it with one RegExp:
1.SELECT DISTINCT CITY FROM STATION WHERE NOT REGEXP_LIKE(CITY, '^[AEIOU]') OR NOT REGEXP_LIKE(CITY,'[aeiou]$');

2.SELECT DISTINCT city FROM station WHERE NOT REGEXP_LIKE(city,'^[AEIOU].*[aeiou]$');

// 👆 My question1: Without using 'NOT' and 'OR' operator of SQL can't we use any inverse metacharacter in Regular Expression?

RegEx[ not(A and B) ] = RegEx [not(A) or not(B) ]

See the output of this to be more specific 👇
https://code.sol
https://code.sololearn.com/WzGF3KRsC2B7/?ref=app

Problem: https://www.hackerrank.com/challenges/weather-observation-station-11

Answer 1

sorry I saw this post the other day and noticed it still has no reply.

I am unsure if regex has what you've described. it would be handy. is this an exercise question being asked because there definitely is a way to do it or are you just asking out of curiosity?

Answer 2

Nathan Stanley yes, I am curious. I am newbie in Regular expressions and trying to solve the problem in different ways to explore whats possible or not with RegExp.