How to Convert the Case of a String

BigQuery provides several case related functions as we can see in the following SQL example:

WITH schedules AS
  (SELECT 'Marlins' as homeTeamName, 'Cubs' as awayTeamName UNION ALL
   SELECT 'Braves', 'Cubs' UNION ALL
   SELECT 'Marlins', 'Braves' 
SELECT lower(homeTeamName) AS lower,  
       upper(awayTeamName) AS upper, 
       initcap('hello') AS initcap 
FROM schedules 
lower upper initcap
marlins CUBS Hello
braves CUBS Hello
marlins BRAVES Hello