upper case sql code example

Example 1: uppercase and lowercase in sql

select UPPER('converted to upper');
select LOWER('CONVERTED TO LOWER');

Example 2: upper case sql

SELECT upper('Hello World');		-- HELLO WORLD
SELECT lower('Hello World');		-- hello world

Example 3: how to upper case in sql

SELECT UPPER(FIRST_NAME) , LOWER(LAST_NAME)
FROM CUSTOMERS ;