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The terms instance and database are closely related, but don't refer to the same thing.
The database is the set of files where application data (the reason for a database) and meta data is stored.
An instance is the software (and memory) that Oracle uses to manipulate the data in the database. In order for the instance to be able to manipulate that data, the instance must open the database. A database can be opened (or mounted) by more than one instance, however, an instance can open at most one database.
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Difference between database and database instance?
In general, a database is a collection of related data. In more specific terms, a database is typically a collection of computer files, usually stored on disk, used to contain and manage this data. The logical structure of a database (as organized in tables, indexes, views, etc.) does not necessarily correspond directly to its physical structure (the data files, transaction log files, etc.). A database instance is the instantiation of memory structures and processes by a database management system manages the logical and physical structures and the data organized and stored therein. An application program must connect to and interact with the database instance in order to insert, retrieve, modify, and/or delete data stored in the database.
What is Difference between real time database and simple database?
the difference is about the transactions. the normal database is not included deadline, but the real time database is.
What is the difference between database and database administrator?
Database is the data stored in the server and Database administrator is the person who designs the database.
Difference between logical database and physical database?
A logical database refers to the conceptual schema or model of data relationships and structures, independent of how data is stored or accessed. On the other hand, a physical database involves the actual implementation of the database on a specific hardware system, detailing how data is stored and accessed. The logical database design focuses on the organization of data, while the physical database design focuses on optimizing performance and storage efficiency.
What is the Difference between relation schema and relation instance?
difference between relation sehema and relation instance in dbms
What are difference between cache database and sql database?
CACHE is multidimensional and postconsonantal database and its supporting scripting
What is the difference between logical database and physical database?
A logical database refers to the way data is organized, modeled, and accessed by users, focusing on the structure and relationships of data. In contrast, a physical database relates to how data is actually stored on disks, including indexes, partitions, and access paths designed for efficient data retrieval and storage.
What is the difference between data model and schema in database?
As I understand it, a database schema is a physical entity, it describes the structure of exactly how the data is stored and is itself stored by DBMS for reference. Data model, on the other hand, is an abstract representation of database.
What is the difference between database management and documents management systems?
differences between document management and database technology
What is the difference between a database management system and a database?
DBMS: Set of software applications combined w/ a database
What is the Difference between an architect and a dba?
An architect is someone who designs the business rules and physical layout of the database. A DBA maintains the database environment, and depending on the extent of the DBA's skills also does the database programming. In doing so executes the architects vision.
What is the Difference between manual database and electronic database?
A manual database is MANUAL and an electronic is electronic LOL! Simple :P
