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Describe the primary key functions?
Primary Key : The primary key is an attribute or a set of attributes in which uniquely identify a specific example of an entity. Every entity in the data model must have a primary key whose values uniquely recognize instances of the entity.
To qualify as a primary key for an entity, an attribute must have the subsequent properties: * It must have a non-null value for each instance of the entity. * The value must be unique for each instance of an entity * The values must not change or become null during the life of each entity instance.
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random file orgnization
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
real life situations where database management system are most suitable
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