nothing changed.that's why i am surprised

i got it.but i have another problem.I have got the server name in a variable @servername.and i want to use it to query other servers msdb (other sql servers...

Thx for the query .But its returning null.@string contains value 652127 but @output shows null

Here's my query:

This is my first statement:-

set @string1= 'select MAX(backup_set_id)

...