The T-SQL LOWER() command allows you to change an uppercase string to a lowercase string.

For example, it will allow you to change the word HELLO to hello.

Example 1:

Declare @MyVar varchar(50);
Set @Myvar=’HELLO’;
Select LOWER(@MyVar)   => Output will be hello in lowercase.

You can use the T-SQL LOWER() command with other commands to Capitalize only the first letter of a word.

For example, change FLORIDA  to Florida.

Example2:

DECLARE @MyVar varchar(50);
SET @Myvar=’FLORIDA’;
SELECT LEFT(@MyVar,1) +SUBSTRING(LOWER(@MyVar),2,49)

Since my string is of length 50, notice that I am selecting the first letter that is already in uppercase and concatenating with the rest 49 letters in lowercase starting with the second position in the string.