sql server - Checking for any column updated in triggers -

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i need validate in trigger on sql server 2008r2 if of columns updated.

basically have table example employee , employeehistory. insert/update/delete on employee table should generate record in history one. don't care column. example, can use 

if columns_updated()      insert history??? else     nothing?

is right way of checking this? there other function? update() specific column. what's best practice this? i'm sure i'm not first 1 want create history record of table!

using columns_updated() ok.

but if nothing updated, trigger won't fire, it?

what trying in end?


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