CONTAINER You can specify the CONTA

CONTAINER You can specify the CONTAINER clause when you set a parameter value in a CDB. A CDB uses an inheritance model for initialization parameters in which PDBs inherit initialization parameter values from the root. In this case, inheritance means that the value of a particular parameter in the root applies to a particular PDB.A PDB can override the root's setting for some parameters, which means that a PDB has an inheritance property for each initialization parameter that is either true or false. The inheritance property is true for a parameter when the PDB inherits the root's value for the parameter. The inheritance property is false for a parameter when the PDB does not inherit the root's value for the parameter.The inheritance property for some parameters must be true. For other parameters, you can change the inheritance property by running the ALTER SYSTEM SET statement to set the parameter when the current container is the PDB. If ISPDB_MODIFIABLE is TRUE for an initialization parameter in the V$SYSTEM_PARAMETER view, then the inheritance property can be false for the parameter.If you specify CONTAINER = ALL, then the parameter setting applies to all containers in the CDB, including the root and all of the PDBs. The current container must be the root.Specifying ALL sets the inheritance property to true for the parameter in all PDBs.If you specify CONTAINER = CURRENT, then the parameter setting applies only to the current container. When the current container is the root, the parameter setting applies to the root and to any PDB with an inheritance property of true for the parameter.