cursor (fetching two variables)

Experts,

I have a table with two columns for a cursor. The first column is server name and the second is DB name. I have a table x in all the DBs in all the servers and I want to select from that table in all the DBs in all the servers.

I was trying to use a cursor to pass server name and DB name and add the dbo.x to select all from the table x. so like

          SELECT   *

           FROM @SERVER_NAME.@DB_NAME.dbo.x

How can I use a cursor to pass (fetch values) the variable for the @SERVER_NAME.@DB_NAME

help truly appreciated

ebro