The most important performance-tuning technique available is having the needed indexes created on the tables to ensure that the SQL Server database engine is able to get the data that it needs to as ...
-- For session_id 1, 2 and 3 have a duration greater or equal than 0 minutes and less than 5 minutes. -- For session_id 4 has a duration greater or equal than 5 minutes and less than 10 minutes. -- ...