How to find the city name not starting and ending with a vowel

Question

I\'m trying to query the list of CITY names from STATION that do not start with vowels and do not end with vowels. The result cannot contain duplicates.

At first I tried

Answer 1

A little easier to read would be:

    SELECT DISTINCT  CITY 
    FROM STATION 
    WHERE  SUBSTR(CITY,1,1) NOT IN ('A','E','I','O','U')
    AND SUBSTR(CITY,-1,1) NOT IN ('A','E','I','O','U');

Note the -1 in the second WHERE clause which tells Oracle to search from the end of the string.