How do I know if a database is running?

How can I tell if a database is running?

Use the below code, to fetch database status information on the windows operating system: SELECT INSTANCE_NAME, STATUS, DATABASE_STATUS FROM V$INSTANCE; The above code is executed on the SQL developer tool on windows and the below output shoes database_status as active.

How do I know if my DB Link is working?

We can verify public database link using select * from dual@public_db_link; How private db links can be verified by a DBA if application schema's password is not known.

How do I know if my database is running RAC?

There are several ways to check the status of the RAC. The srvctl utility shows the current configuration and status of the RAC database. The V$ACTIVE_INSTANCES view can also display the current status of the instances.

How do I know if my database is primary or standby?

You can use the DGMGRL show configuration and show database database_name commands to confirm the Data Guard Standby database configuration before enabling a standby database. Here is how you enable your primary and standby databases using the DGMGRL command: DGMGRL> enable configuration; Enabled.