Stripping Non-numeric Chars From A Field String - SQL 2000

Jul 20, 2005

Hi there - I would like to share this strip of code with our SQL 2000
DBA community. The code below strips all non-numeric characters from a
given string field and rebuilds the string. Very simple, but I had to
build it from scratch due the lack of info on this specific matter. I
am sure there are better solutions out there, although I will be glad
if this script can help anyone. Feel free to modify and comment it
back.

Regards,

Rubem Linn Junior
MCSE, .NET developer
Web Apps Specialist

------------------------------------------------------- BEGIN
---------------------------------------------------

DECLARE @String_Length AS INTEGER -- Length of the given string
DECLARE @Original_String as NVARCHAR(50) -- The field to strip
non-numeric chars
DECLARE @counter as integer -- simple counter variable
DECLARE @Stripped_String as nvarchar(50) -- The field after been
stripped

-- Get the length of the field (string) to be parsed
SELECT @String_Length = len(someStringField) FROM SomeTable WHERE
FilterID = 001

-- Get the field (string) to be parsed
SELECT @Original_String = someStringField FROM SomeTable WHERE
FilterID = 001

-- Set counter variable to 1
SELECT @counter = 1

-- Reset this variable
SELECT @Stripped_String = ''

-- Initiate loop from 1 to the Length of the given string
WHILE (@counter) <= @String_Length
BEGIN

-- Check if the char in the lap is numeric
if substring(@Original_String,@counter,1) LIKE '[0-9]'
BEGIN

-- Load this variable with the non-numeric
-- data stripped from the original string
select @Stripped_String = @Stripped_String +
substring(@Original_String,@counter,1)

END

-- Increment the counter by one
select @counter = @counter + 1

END

-- Print the original string with all characters
PRINT @Original_String

-- Print the numeric data that was stripped out
PRINT RTRIM(LTRIM(@Stripped_String))

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