sql server - How Select Distinct Not convertable Value on a Column at SQL Sever -

i have table, 1 of field string, value may int (convertable int) , maybe string (column update by):

if value system service, means not related user table if value convertable int, means related user table.

how can select distinct value not related user table?

*update string on db.

if integer looking for, not like better isnumeric():

select distinct [update by] t [update by] not '%[^0-9]%';