| Oracle® Database Reference 11g Release 1 (11.1) Part Number B28320-01 | 
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DBA_HIST_DATABASE_INSTANCE displays the databases and instances in the Workload Repository.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| DBID | NUMBER | NOT NULL | Database ID | 
| INSTANCE_NUMBER | NUMBER | NOT NULL | Instance number | 
| STARTUP_TIME | TIMESTAMP(3) | NOT NULL | Startup time of the instance | 
| PARALLEL | VARCHAR2(3) | NOT NULL | Indicates whether the instance is running in a Real Application Clusters (RAC) environment ( YES) or not (NO) | 
| VERSION | VARCHAR2(17) | NOT NULL | Database version | 
| DB_NAME | VARCHAR2(9) | Name of the database | |
| INSTANCE_NAME | VARCHAR2(16) | Name of the instance | |
| HOST_NAME | VARCHAR2(64) | Name of the host | |
| LAST_ASH_SAMPLE_ID | NUMBER | NOT NULL | Last sample ID for the active session history |