Relationship between OracleServiceXXX and Oracle instances in windows
In fact, oracle in windows is completely dependent on OracleServiceXXX in the window service when the oracle instance is started. This XXX is the oracle Instance name (note that it is not the Database Name, but the Instance name. If you do not understand the meaning of these two names, please go to the palace .)
As long as OracleServiceXXX does not start, sqlplus will never enter. (Ora-12560 error will be reported. But the ora-12560 error may not be caused by OracleServiceXXX not starting)
So here is a problem: Does OracleServiceXXX start an oracle instance? Or what is the relationship between OracleServiceXXX and oracle instance startup?
Start Windows-Program-oracle --- configuration and porting tool-Administration Assistant for Windows
It is worth noting that the thread can also be killed from here: