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.
<span>A ground fault circuit interrupter (GFCI) is a device that closes off an electric power circuit when it notices that current is curving alongside an unintentional path, such as over water or an individual. Circuit breaker GFCIs are frequently used as substitutes for standard circuit breakers and offer GFCI guard to all holders on that discrete circuit. So therefore, the answer is B.</span>
Answer:
The answer to this question can be given as:
In this question the option b,c, and d are correct.
Explanation:
A (DBMS) stands for a database management system. The DBMS is a software package that is used for crate, update, and delete. The database uses the SQL which stands for the structured query language. It is a programming language that uses the queries. These queries are used to providing many operations in the database like crate table, update table, join table, create a view of the table, etc. In the database, we can view the code of the join table and is also used to hide the complexity of retrieval operations, it can help in the update the table in a single statement.
