Weather Observation Station 6

Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. Your result cannot contain duplicates.

Weather Observation Station 6 | HackerRankHackerRank

Sol:

SELECT DISTINCT CITY FROM STATION WHERE CITY REGEXP '^[AEIOU]';

Explanation:

REGEXP '^[AEIOU]': This condition in the WHERE clause checks if the CITY column starts with any of the vowels 'A', 'E', 'I', 'O', or 'U' using the regular expression pattern ^[AEIOU]. The ^ denotes the start of the string, and [AEIOU] matches any one character from the specified set of vowels. Note: The REGEXP operator is used in SQL to perform pattern matching using regular expressions. Regular expressions are patterns used to match character combinations in strings.