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This article introduces the relevant knowledge of "what are the states of DM database?". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The DM database contains the following states:

1. Configuration status (MOUNT): access to database objects is not allowed, only operations such as control file maintenance, archive configuration, database schema modification, etc.

two。 Open status (OPEN): can not control file maintenance, archive configuration and other operations, you can access database objects to provide normal database services

3. Pending status (SUSPEND): the only difference from the OPEN state is to restrict disk writing; once the data page is modified, the REDO log and data page flush are triggered, and the current user will be suspended.

OPEN state and MOUNT and SUSPEND can be converted to each other, but MOUNT and SUSPEND cannot be converted to each other.

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