The parameter value when the period began.
The parameter value when the period ended.
The database instance number. Note: Numbers greater than Number.MAX_SAFE_INTEGER will result in rounding issues.
Indicates whether the parameter value changed within the period.
Indicates whether the parameter value in the end snapshot is the default.
The name of the parameter.
Indicates whether the parameter has been modified after instance startup:
The summary of the AWR change history data for a single database parameter.