Complex Attribute: A complex attribute is an attribute that is both composite and multivalued.
Surrogate ID's
Values of columns
database simple attritbute
In database technology, domain refers to the description of an attribute's allowed values. The physical description is a set of values the attribute can have, and the semantic, or logical, description is the meaning of the attribute.
Prime attribute are part of any candidate key. Non-prime attribute are not part of any candidate key.
It is the number of attribute of its relation schema. Its is an association among two or more entities..
an attribute, quality, or characteristic of something.
Entity is real world thing,person,place,event or object about which store data in database. Attribute are the characteristics of entity is called attribute.
An attribute is a characteristic or feature of an object or entity. It helps to describe or define the object by providing specific information about it. Examples of attributes include color, size, shape, and weight.
In a database management system (DBMS), an attribute may describe a component of the database, such as a table or a field, or may be used itself as another term for a field. Commonly we can say that an attribute is a "propety" of a database field or its a characteristic or facet of the data field..
collection of interrelated data & set of program & access those programITS GOALprimary goal of dbms is store & retrieve the database information in convenient & efficient way