A structured SQL practice repository for HackerRank SQL challenges and SQL certification preparation. This repository documents my SQL learning process through clean solution files, challenge tracking ...
WHERE LOWER(LEFT(city, 1)) NOT IN ('a', 'e', 'i', 'o', 'u') OR LOWER(RIGHT(city, 1)) NOT IN ('a', 'e', 'i', 'o', 'u'); ...