Hi everyone, I was trying to read some documents about non-RMAN recovery method (I'm a junior DBA) and I find the following commands are quite confusing:

1) SET AUTORECOVERY ON
2) RECOVER DATAFILE.....
3) RECOVER AUTOMATIC DATAFILE....

Well, do we have to run SET AUTORECOVERY ON everytime we begin the recovery process (e.g right after you take the infected datafile offline) ??

Secondly, what's the different between RECOVER DATAFILE ... command and RECOVER AUTOMATIC DATAFILE ... comand. Is it the same thing??

Thirdly, if I use do not run SET AUTORECOVERY ON does that mean I have to run RECOVER AUTOMATIC DATAFILE instead of RECOVER DATAFILE command.

I'm very confused. Muchly appreciated if anyone of the gurus in here can give me a crash course on these commands.
Thx a bunch