Convert UPPER Case and LOWER Case to Proper Case/Title Case in SQL Server

First We have to create a function for proper case.

CREATE FUNCTION [dbo].[ProperCase]
(
@Input as varchar(8000)
)
RETURNS varchar(8000)
AS
BEGIN
DECLARE @Reset bit,
@Proper varchar(8000),
@Counter int,
@FirstChar char(1)
SELECT @Reset = 1, @Counter = 1, @Proper = ''
WHILE (@Counter <= LEN(@Input))
BEGIN
SELECT @FirstChar = SUBSTRING(@Input, @Counter, 1),
@Proper = @Proper + CASE WHEN @Reset = 1 THEN UPPER(@FirstChar) ELSE LOWER(@FirstChar) END,
@Reset = CASE WHEN @FirstChar LIKE '[a-zA-Z]' THEN 0 ELSE 1 END,
@Counter = @Counter + 1
END
SELECT @Proper = REPLACE(REPLACE(REPLACE(LTRIM(RTRIM(@Proper)),' ',' '+ CHAR(7)) , CHAR(7)+' ',''), CHAR(7),'')
WHERE CHARINDEX(' ', @Proper) > 0
RETURN @Proper
END

Then after write a query for test.

Output: Nikhilsangani