SQL changing a value to upper or lower case

Question

How do you make a field in a sql select statement all upper or lower case?

Example:

select firstname from Person

How do I make firstname always return up

Answer 1

You can use LOWER function and UPPER function. Like

SELECT LOWER('THIS IS TEST STRING')

Result:

this is test string

And

SELECT UPPER('this is test string')

result:

THIS IS TEST STRING