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The following relational database schema represents part of a simplified database used by a library: tblBook (BookID, Title, PublisherID, Category,Price) tblPublisher (Publishe
how many hourse have been spent on a certain project
Explain the database Planning Project ?
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
Describe the functions and features of foreign key? Foreign Key : The primary key of one file or table that is implanted in another file or table to implement the relationships
What is NULL? Simply NULL means not in value.
describe objectivde of file organisation
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
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