What is a relation? What is a relational DB or database? What is an unnormalized relation?...

What is a relation?
What is a relational DB or database?
What is an unnormalized relation? Is it a relation according to the definition of the word relation?
What is a primary key?
What is the primary key for each table in the Colonial Adventure Tours database shown in Figures 1-15, 1-16, 1-17, 1-18, and 1-19 in Chapter 1?

Expert Solution

A. Relation in terms of the database in simple language means a table or a collection of tuples(rows) and attributes(columns) having some inter-related data value.

B. A relational database is the collection of data items with predefined relation between them. In a simple language, one can understand it as the collection of relations(tables) storing some interlinking data which is connected together using some primary or foreign key.

C. An unnormalized relation is a structure in which entities need not be single-valued but that satisfies all the other properties of a relation so yes it is a relation.

D. The table's primary key is the field or fields that uniquely identify a given row within the table.

E. please provide the table.

venereology answered 2 years ago

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