Question

Does any have any query that returns apha numerice values only

Sample

Select FirstName,Surname,NationalID From Contacts

Results

FirstName|Surname|NationalID
Tony |Smith |934&#fdsaf$34£51
Mary |Jones |655^!ffdat@389£2

Expected results

FirstName|Surname|NationalID
Tony |Smith |934fdsaf34£51
Mary |Jones |655ffdat389£2

In other words i want the query to return numbers and text only :. A-Z and 0-9 only remving ‘$%^&*(~>

Answer 1

You could try the patindex function. For example with just selecting the FirstName this will remove the first occurrence of non alphanumeric:

SELECT replace(FirstName, substring(FirstName, patindex('%[^a-zA-Z0-9]%', FirstName), 1), '') FROM CONTACTS

To expand this to removing all occurrences, move the patindex call into a function as mentioned here:

CREATE FUNCTION CleanVarchar(@Temp VARCHAR(1000))
RETURNS VARCHAR(1000)
AS
BEGIN

    WHILE PATINDEX('%[^a-zA-Z0-9]%', @Temp) > 0
        SET @Temp = STUFF(@Temp, PATINDEX('%[^a-z^0-9]%', @Temp), 1, '')

    RETURN @TEmp
END

Finally call the function

Select CleanVarchar(FirstName),CleanVarchar(Surname),CleanVarchar(NationalID) From Contacts