Patricia, a database system manager for a large hotel chain, is setting up a relational database to track customer hotel registrations for each hotel. The table in the database currently includes fields (columns) for First Name, Last Name, Phone, Email, License Plate #, and Check-in Date.What can Patricia do to make sure that each record (row) in the database is unique?answerDesignate the Phone field as the primary key.Combine the Email field and the Phone field to use as the primary key.Designate the License Plate # field as the primary key.Create an additional Check-in ID field.
Question
Patricia, a database system manager for a large hotel chain, is setting up a relational database to track customer hotel registrations for each hotel. The table in the database currently includes fields (columns) for First Name, Last Name, Phone, Email, License Plate #, and Check-in Date.What can Patricia do to make sure that each record (row) in the database is unique?answerDesignate the Phone field as the primary key.Combine the Email field and the Phone field to use as the primary key.Designate the License Plate # field as the primary key.Create an additional Check-in ID field.
Solution
To ensure that each record (row) in the database is unique, Patricia can create an additional field called "Check-in ID". This field would serve as the primary key in the database. A primary key is a unique identifier for each record in a database. By creating a unique Check-in ID for each customer registration, Patricia can ensure that each record in the database is unique, even if customers have the same name, phone number, email, or license plate number. This method is often used in databases because it does not rely on the data itself being unique, but rather assigns a unique identifier to each record.
Similar Questions
Patricia, a database system manager for a large hotel chain, is setting up a relational database to track customer hotel registrations for each hotel. The table in the database currently includes fields (columns) for First Name, Last Name, Phone, Email, License Plate #, and Check-in Date.What can Patricia do to make sure that each record (row) in the database is unique?answerDesignate the Phone field as the primary key.Combine the Email field and the Phone field to use as the primary key.Designate the License Plate # field as the primary key.Create an additional Check-in ID field.
not a relational database?
The following tables form part of a database held in a relational DBMS:Hotel (hotelNo, hotelName, city)Room (roomNo, hotelNo, type, price)Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo)Guest (guestNo, guestName, guestAddress)where Hotel contains hotel details and hotelNo is the primary key;Room contains room details for each hotel and (roomNo, hoteINo) forms the primary key;Booking contains details of bookings and (hoteINo, guestNo, dateFrom) forms the primary key;Guest contains guest details and guestNo is the primary key.
A relational database consists of a collection of
Which of them is not a relational database?
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