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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.
bal amar
the difference is about the transactions. the normal database is not included deadline, but the real time database is.
Database is the data stored in the server and Database administrator is the person who designs the database.
A relationship.
Relation is one record in the database or a tuple. Relationship is that how tables are connected to each other.
Relation: In Database a relation represents a table or an entity that contain diffrenet attributes.An Entity constructs a relation(table) in DBMS . Relationship: In Data base relationship is that how the two entities are connected to each other ,i.e what kind of relationship type they hold between them.Primary/Foreign key is used to specify or hold this relationship. By Tanzeel Ur Rahman Bhatti
A database is a structured collection of data, while a database instance refers to a single running copy of a database system. Think of a database as the overall system that stores data, and a database instance as a specific iteration of that system currently running in memory.
difference between relation sehema and relation instance in dbms
CACHE is multidimensional and postconsonantal database and its supporting scripting
A binary relationship is a type of relationship between the entities, which links to types of entities in it.
differences between document management and database technology