WGU C175 Study Notecards

Document Content and Description Below

WGU C175 Study Notecards 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. I ... nformation ✔✔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." What is the name of this relationship? ✔✔One-to-one b [Show More]

Last updated: 3 years ago

Preview 1 out of 16 pages

Buy Now

Instant download

We Accept: