hello - if we create two triggers in a database on two different tables, how does sql server handle the internal tables? since the tables that are created are named inserted and deleted, wouldn't this create a conflict the two triggers are fired at the same time? thank you in advance...

These are temporary, memory-resident tables which are only available when the trigger fires for the session. It will not have any conflict with other sessions.

You may read in the below link:

https://msdn.microsoft.com/en-us/library/ms191300%28v=sql.100%29.aspx?f=255&MSPPError=-2147217396

create a conflict the two triggers are fired at the same time?

In an INSERT/UPDATE/DELETE Statement you can address always only one table, so the Triggers won't fire at the same time.