Help ! How Do I Refer To The Deleted Table Into A Trigger Statement ?

Hi there,

Could somebody post some simple example how one can refer to
a column in the 'deleted' temporary table within a trigger definition ?
Should the 'deleted' and 'inserted' temp tables be declared, or they are
'implied' ?

I keep having this msg when trying to create a trigger
"The column prefix 'deleted' does not match with a table name or alias name
used in the query"

Thanks for your inputs,
Eddy.