Is it possible for osquery to monitor command line data in real time(continues streaming) instead of taking snapshots??

Yes, but this can be a complex endeavor depending on your goal, check out the docs here https://osquery.readthedocs.io/en/latest/deployment/process-auditing/

Thank you @theopolis!! Btw my goal is to log every command that gets executed within a sec or even less( Ex:ls -la ).....and I would like to do it without losing any data :)