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SQL SERVER – UDF – Function to Convert Text String to Title Case – Proper Case

Pinal Dave
SQL Tips and Tricks
102 Comments

Following function will convert any string to Title Case. I have this function for long time. I do not remember that if I wrote it myself or I modified from original source.

SQL SERVER - UDF - Function to Convert Text String to Title Case - Proper Case

Run Following T-SQL statement in query analyzer:

SELECT dbo.udf_TitleCase('This function will convert this string to title case!')

The output will be displayed in Results pan as follows:

This Function Will Convert This String To Title Case!

T-SQL code of the function is:

CREATE  FUNCTION udf_TitleCase (@InputString VARCHAR(4000) )
RETURNS VARCHAR(4000)
AS
BEGIN
DECLARE @Index INT
DECLARE @Char CHAR(1)
DECLARE @OutputString VARCHAR(255)
SET @OutputString = LOWER(@InputString)
SET @Index = 2
SET @OutputString =
STUFF(@OutputString, 1, 1,UPPER(SUBSTRING(@InputString,1,1)))
WHILE @Index <= LEN(@InputString)
BEGIN
SET @Char = SUBSTRING(@InputString, @Index, 1)
IF @Char IN (' ', ';', ':', '!', '?', ',', '.', '_', '-', '/', '&','''','(')
IF @Index + 1 <= LEN(@InputString)
BEGIN
IF @Char != ''''
OR
UPPER(SUBSTRING(@InputString, @Index + 1, 1)) != 'S'
SET @OutputString =
STUFF(@OutputString, @Index + 1, 1,UPPER(SUBSTRING(@InputString, @Index + 1, 1)))
END
SET @Index = @Index + 1
END
RETURN ISNULL(@OutputString,'')
END

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