SQL Server, where field is int?

Question

how can I accomplish:

select * from table where column_value is int

I know I can probably inner join to the system tables and type tables b

Answer 1

select * from table
where column_value not like '[^0-9]'

If negative ints are allowed, you need something like

where column_value like '[+-]%' 
and substring(column_value,patindex('[+-]',substring(column_value,1))+1,len(column_value))
not like '[^0-9]'

You need more code if column_value can be an integer that exceeds the limits of the "int" type, and you want to exclude such cases.