Reject random characters in name field

Question

Hi Everyone,
I am trying to develop a heuristic for checking the value in a field to make sure that the value coming from an external database table is a word rather than random characters.  For example, identify the value "asdfadfag" entered into the
first name field instead of a legitimate word (Kim, John, Ken, etc). Based on the output, I could either pass the record or reject it. I realize that this might be a pretty tall order, but I want to be reasonably sure that the value in a name field is, in
fact, a name before I commit the record to the database table.  I do not have access to the front end web app that is the source of the data.  Any suggestions?

Answer 1

If you have possible list of valid names , you can try using the SQL Server inbuilt functions SOUNDEX or DIFFERENCE.
Difference and Soundex
create table test1(c1 int identity(1,1),c2 varchar(100))
create table test(c varchar(100))
insert into test (c) values ('John'),('Peter'),('Rose'),('jack'),('Kim')
insert into test1 (c2) values ('John'),('Peter'),('sdgev'),('asdfadfag'),('kem')
select * from
test1 where not exists (select 1 from test where SOUNDEX(c2)=SOUNDEX(c))
select * from
test1 where not exists (select 1 from test where DIFFERENCE(c2,c)>=2)
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