Several applications and Tablespaces

Hi all

I am currently a SQL Server DBA and Admin, but I'm currently trying to learn a little more about how Oracle does its thing. Therefore, someone could help me with the following:

In SQL Server, we have up to 70 - 80 'Databases' attached to a single database "Instance". Each database may be for a particular application, we develop for one of our customers, or it could even be for a specific internal system.

I know that Oracle has a definition different from what a "database" is so I was wondering if someone could give some tips on how I would create my 70 or 80 databases under Oracle (if I were so inclined).

The closest analogue I can see in Oracle might Tablespaces, but which does not seem like a fit perfect either. It is common to have several applications running database in an instance of Oracle or even possible, or is Oracle perhaps everything designed for applications simple uber?

A big thank you to all those who can help you

Best regards

Simon

[email protected] wrote:
Hi all

I am currently a SQL Server DBA and Admin, but I'm currently trying to learn a little more about how Oracle does its thing. Therefore, someone could help me with the following:

In SQL Server, we have up to 70-80 'Databases' attached to a single "Instance" database > Each database may be for a particular application, we develop for one of our customers, or it could even be for a specific internal system.

I know that Oracle has a definition different from what a "database" is so I was wondering if someone could give some tips on how I would create my 70 or 80 databases under Oracle (if I were so inclined).

The closest analogue I can see in Oracle might Tablespaces, but which does not seem like a fit perfect either. It is common to have several applications running database in an instance of Oracle or even possible, or is Oracle perhaps everything designed for applications simple uber?

A big thank you to all those who can help you

Best regards

Simon

The analogy is that a 'database' in SQLServer looks more like a 'plan' in Oracle. A schema is the collection of all the objects (tables, indexes, procedures, etc.) that belong to a single user account. This user account can be created for the sole purpose of owning objects. Real users (humans or applications that connect with their own credentials on behalf of a human being) can benefit from access to schema objects.

There is no inherent link between this and a tablespace. While that a user account has a default tablespace for objects it is, the user can actually have the objects in any tablespace for which there quota. And a given tablespace can contain objects of multiple schemas. Many DBA will make a relationship one-to-one between a schema/user and a tablespace, but it's strictly an organizational decision and there is nothing defined in the database to apply it.

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