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Write short note on Data models?
Data models: A data model is an abstract model which elaborates how data is represented and accessed. The term data model has two commonly accepted meanings:
• A data model theory that is a formal description of how data may be structured and accessed.• A data model instance that is applying a data model theory to create a practical data model instance for a few particular application.
The database will enable college administrators the ability to track students initial major. This will help college officials decide how best to prepare students for their goals an
Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat
What is property - properties of a database ? It is an integrated collection of logically related records. It consolidates separate files into a common pool of data records and
Complexity : A distributed DBMS that is available, reliable, and secure is inherently more difficult than a centralised DBMS. Though, adequate data replication is essential to have
for the following business rules . Identify all entities, attributes, relationships, primary keys, cardinalities and constraints where appropriate 3. (9) An art museum owns a larg
INTRODUCTION Databases and database systems have become an essential part of our daily life. We encounter many activities that involve some interaction with a database almost
What is Trigger? Trigger: A database trigger is procedural code which is automatically executed in response to specific events on a particular table in a database. Triggers can
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
Describe association design of an object by giving one suitable example of it. The Design of Associations Associations are "glue" of advanced object oriented analysis and
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
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