Without declaring SCOPE
If you do not specify this clause, then:- If a server parameter file was used to start up the database, then BOTH is the default.
- If a parameter file was used to start up the database, then MEMORY is the default, as well as the only scope you can specify.
| Started by | SCOPE |
|---|---|
| spfile | BOTH |
| pfile | MEMORY |
Without declaring SID
If you do not specify this clause, then:- If the instance was started up with a pfile (traditional plain-text initialization parameter file), then Oracle Database assumes the SID of the current instance.
- If the instance was started up with an spfile (server parameter file), then Oracle Database assumes SID = '*'.
| Started by | SID |
|---|---|
| spfile | * (All instances) |
| pfile | (Current instance) |
Without declaring CONTAINER
If you omit this clause, then CONTAINER = CURRENT is the default, not ALL.For more information, you may refer to this document:
ALTER SYSTEM