SQL function, extract numbers before - - sql-server-2005

Question

i'm playing around with building a sql function that will extract numbers from a title, which is what the following code below does. Although, i want to modify this function to parse numbers into sections. For example:
Current Data in title field:
QW 1 RT 309-23-1
QW 1 RT 29-1
QW 1 RT 750-1
QW RT 750-1
Temp tables created once function is ran on title field:
column 1 Column 2 Column 3 Column 4
1 309 23 1
1 29 1 Null
1 750 1 Null
Null 750 1 Null
create function [dbo].[ExtractNumbers](#Numbers nvarchar(2000))
returns nvarchar(2000)
as
BEGIN
declare #NonNumericIndex int
set #NonNumericIndex = PATINDEX('%[^0-9]%',#Numbers)
WHILE #NonNumericIndex > 0
begin
SET #Numbers = REPLACE(#Numbers,SUBSTRING(#Numbers,#NonNumericIndex,1),'')
SET #NonNumericIndex = PATINDEX('%[^0-9]%',#Numbers)
SET
end
return #Numbers
END

Answer 1

Here's one way.
Although actually at the end I realised the format was more fixed than I had originally realised so you may be better off just using the various string manipulation functions to calculate the columns directly.
WITH TestTable AS
(
SELECT 'QW 1 RT 309-23-1' AS title UNION ALL
SELECT 'QW 1 RT 29-1' UNION ALL
SELECT 'QW 1 RT 750-1' UNION ALL
SELECT 'QW RT 750-1'
)
SELECT title, [1] AS [Column 1], [2] AS [Column 2],[3] AS [Column 3],[4] AS [Column 4]
FROM TestTable CROSS APPLY dbo.GetNumbers(title)
PIVOT
(MAX(num) FOR idx IN ([1], [2],[3],[4])
) AS PivotTable;
Uses the following TVF
CREATE FUNCTION GetNumbers
(
#Numbers NVARCHAR(2000)
)
RETURNS #Results TABLE
(
idx INT IDENTITY(1,1),
num INT
)
AS
BEGIN
DECLARE #NonNumericIndex INT, #NumericIndex INT
SET #NumericIndex = PATINDEX('%[0-9]%',#Numbers)
IF (#NumericIndex > 4) --First Column not there
INSERT INTO #Results VALUES (NULL)
WHILE #NumericIndex > 0
BEGIN
SET #Numbers = RIGHT(#Numbers,LEN(#Numbers)-#NumericIndex+1)
SET #NonNumericIndex = PATINDEX('%[^0-9]%',#Numbers)
IF(#NonNumericIndex = 0)
BEGIN
INSERT
INTO #Results VALUES (#Numbers)
RETURN
END
ELSE
INSERT
INTO #Results VALUES
(LEFT(#Numbers,#NonNumericIndex-1))
SET #Numbers = RIGHT(#Numbers,LEN(#Numbers)-#NonNumericIndex+1)
SET #NumericIndex = PATINDEX('%[0-9]%',#Numbers)
END
RETURN
END