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Write short notes on relational model
The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an example of a record based model.
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
Whst is logical schema ? Logical schema is the entire database.
wh
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
multidimensional data model
Determine the benefits of Object oriented design OOD also gives reusability, which saves time, costs and productivity gains through direct mapping to properties of Object-Orie
What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos
Question: This Question refers to the database schema given in the Appendix. (a) The integrity of a database is enforced by integrity rules. Discuss what should happen on a
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