Information technology is the application of computers to store, retrieve, transmit and manipulate data, often in the context of a business or other enterprise.
Explanation:
An organizational unit (OU) is a subdivision within an Active Directory (hierarchical collection of network resources that can contain users, computers, printers, and other Active Directories) into which you can place users, groups, computers, and other organizational units. Each domain can implement its own organizational unit hierarchy, typically used either to differentiate between objects with the same name, or to parcel out authority to create and manage objects.
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Answer:
1) Yes, Publisher relation should have a publisherID primary key.
2) NOT NULL and UNIQUE for the BookID, BranchID, CardNumber and name of the borrower in the Book, Book_Copies, Library_branch, and Borrower relations respectively. The DueDate field of the book_loan relation must be a time constraint. The BookID of the Book relation must be serial number for automatic addition and update of bookid across the database.
Explanation:
The Publisher relation should have primary key publisherID which should replace the publisherName in the Book relation to easily make a join query and attain a third-level database model.
2^8 = 256 hence use 8 bits
