Flat Files - a file having no internal hierarchy
Hashed Files - A file that has been encrypted for security purposes.
Heap File - An unsorted set of records.
Information - The transformation of raw data into use
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Flat Files - a file having no internal hierarchy
Hashed Files - A file that has been encrypted for security purposes.
Heap File - An unsorted set of records.
Information - The transformation of raw data into useful facts.
Punch Card - A card that is perforated and can hold commands or data.
Structured Data - Information with a high degree of organization.
Unstructured Data - Information that does not have structure (such as text)
Binary Relationship - A relationship between two entity types.
Unary Relationship - An associate occurrence of an entity type with other occurrences of the same entity type.
Cardinality - The maximum number of entities that can be involved in a particular relationship.
E-R Model
*E-R = Entity - Relationship - Diagram of entities together with their attributes and the relationship among them.
Intersection Data - It is data that describes a many-to-many relationship.
Modality - It is a minimum number of entity occurrences that can be involved in a relationship.
One-to-one Binary Relationship - It means that a single occurrence of one entity type can be associated with a single occurrence of the other entity type and vice versa.
Ternary Relationship - Involves three different entity types.
Unique identifier - It is used to uniquely identify each record in a database table.
Attribute - A property, characteristic, or fact that we know about an entity.
"A salesperson works in one office."
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