Split words with a capital letter in sql

Question

Does anyone know how to split words starting with capital letters from a string?

Example:

    DECLARE @var1 varchar(100) = \'OneTwoThreeFour\'
    DE         


        

Answer 1

Here is a function I have just created.

FUNCTION

CREATE FUNCTION dbo.Split_On_Upper_Case
 (
     @String VARCHAR(4000)
 )
RETURNS VARCHAR(4000)
AS
BEGIN

DECLARE @Char CHAR(1);
DECLARE @i    INT = 0;
DECLARE @OutString VARCHAR(4000) = '';


WHILE (@i <= LEN(@String))
BEGIN
    SELECT @Char = SUBSTRING(@String, @i,1)

    IF (@Char = UPPER(@Char) Collate Latin1_General_CS_AI) 
       SET @OutString = @OutString + ' ' + @Char;
    ELSE 
       SET @OutString = @OutString +  @Char;

     SET @i += 1;
END

 SET @OutString =  LTRIM(@OutString);

 RETURN @OutString;

END 

Test Data

DECLARE @TABLE TABLE (Strings VARCHAR(1000))
INSERT INTO @TABLE 
VALUES ('OneTwoThree')   ,
       ('FourFiveSix')   ,
       ('SevenEightNine')

Query

SELECT dbo.Split_On_Upper_Case(Strings) AS Vals
FROM @TABLE

Result Set

╔══════════════════╗
║       Vals       ║
╠══════════════════╣
║ One Two Three    ║
║ Four Five Six    ║
║ Seven Eight Nine ║
╚══════════════════╝