Assume that there is only room for one student in a class of two. Why can't a database automatically assign one of the students to the last open seat?
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- Consider the following scenario: there is only one vacant slot in a class and two students want to enroll. Which aspect of a database prevents them from sharing a single seat?A manager has a list of items that have been sorted according to an item ID. Some of them are duplicates. She wants to add a code to the database that assigns a 1 to the item if it is unique, and if there are duplicates, assigns the number of the duplicate. An example is shown below. The first two items are unique, so the repeat code is 1. However, Item ID 37695 is listed six times, so the codes are assigned from 1 to 6, and so on. Explain how to assign the correct code using an IF statement Item ID Repeat Code35080 135222 137695 137695 237695 337695 437695 537695 637712 137722 137757 137757 2 In cell B2 enter 1, and then type a formula into cell B3, followed by dragging the formula down column B until it aligns with the last row in the Item ID column. Which of the following is the correct formula to type into cell B3?Imagine that there is only room for one student in a class that already has two people signed up for it. Why aren't both students allowed to be assigned to the last available seat in the database?
- Bundoora College has a small book store that opens for students, staff and general public. Currently, they use a manual order system. The manager asked you to build a database for them. You had an interview session with him and you get a general overview about the database requirements. The database should store: Orders information made by students, staff or general public. The order should have order number, the date and the time it is made. Customers details, so that the manager can notify the customers with the order status as well as send promotional material. The detail includes customer code, the full name, home address, contact phone number, and email address. List of the items in each order. The items can be books and/or stationeries. For each book, you should be able to include the details such as the title, the authors, the ISBN, and the price. For stationery, you should have the code, description, and price. If a book is required for a particular subject offered in…In a class with just two spots, both students have registered at the same time. Is there a way for both students to be given the last open seat in the database?Let's pretend that there's only room for one student in a class and two people want to sign up for it. Which aspect of a database prevents both students from being assigned the last open seat?
- Two students are registered for one course. Can both students get the last database seat?We need to create a database for the Circulation Department of a public library. The database will store information about the patrons, books, and circulation. It contains the following: 4 tables for the database: PATRON, BOOK_COPY, BOOK, and CHECKOUT. (Since a book may have multiple copies that may be purchased by the library at different time, it is better to have a BOOK_COPY table to avoid unnecessary data redundancy.) The data in the tables are as follows: PATRON table records a patron’s ID, name, address, phone number, and email address. BOOK table contains information such as author, title, publication date, subject, language, and a unique identifier (It can be the ISBN of the book) for each book. BOOK_COPY table records a unique identifier for each copy of a book, the date of purchase, and the identifier of the book from the BOOK table. CHECKOUT table records the date of check-out, patron’s ID, the…We need to create a database for the Circulation Department of a public library. The database will store information about the patrons, books, and circulation. It contains the following: 4 tables for the database: PATRON, BOOK_COPY, BOOK, and CHECKOUT. (Since a book may have multiple copies that may be purchased by the library at different time, it is better to have a BOOK_COPY table to avoid unnecessary data redundancy.) The data in the tables are as follows: PATRON table records a patron’s ID, name, address, phone number, and email address. BOOK table contains information such as author, title, publication date, subject, language, and a unique identifier (It can be the ISBN of the book) for each book. BOOK_COPY table records a unique identifier for each copy of a book, the date of purchase, and the identifier of the book from the BOOK table. CHECKOUT table records the date of check-out, patron’s ID, the…
- We need to create a database for the Circulation Department of a public library. The database will store information about the patrons, books, and circulation. It contains the following: 4 tables for the database: PATRON, BOOK_COPY, BOOK, and CHECKOUT. (Since a book may have multiple copies that may be purchased by the library at different time, it is better to have a BOOK_COPY table to avoid unnecessary data redundancy.) The data in the tables are as follows: PATRON table records a patron’s ID, name, address, phone number, and email address. BOOK table contains information such as author, title, publication date, subject, language, and a unique identifier (It can be the ISBN of the book) for each book. BOOK_COPY table records a unique identifier for each copy of a book, the date of purchase, and the identifier of the book from the BOOK table. CHECKOUT table records the date of check-out, patron’s ID, the…An insurance company needs to store their salespeople’s information who are selling their insurance policies. They already have a database with multiple tables, one of the tables (Salesperson) stores information about each salesperson along with the bonus percent they receive, based on the city where the insurance is sold. The table has the following fields: Salesperson(spID, spName, spBirthDate,spCitySelling, bonusPercent) spID: Unique identification number of the salesperson. spName: Full name of the salesperson. spBirthDate: Birthdate of the salesperson. spCitySelling: The city in which the salesperson is selling the insurance. bonusPercent: The bonus percent received by the salesperson based on the city in which he/she sells the insurance. Each salesperson can sell the insurance in just one city. However, for a city, there can be more than one salesperson appointed. Also, the bonus percent is fixed for each city. For example, all of the salespeople who sells insurance in…There are three tables in this database (see image). Write MYSQL code for: (1) Create a trigger “insert_inventory” on table “Inventory”. The trigger is fired after a row is inserted in table “Inventory”. After a row is inserted in table “inventory”, the “itemid”, the insertion time, and the action is inserted in table “Inventory_history”. The action is set to ‘add an item’. The oldprice is set to null. Test your trigger by inserting a row into Inventory and displaying the contents of Inventory_history. (2) Create a trigger “change_quantity” on table “Transaction”. The trigger is fired after a row is inserted in table “Transaction”. After a row is inserted in table “Transaction”, update the “quantity” in table “Inventory”. For example, if 3 iWatch are sold, then the quantity of iWatch in table “Inventory” is decreased by 3. Test your trigger by inserting a row into Transaction and displaying the contents of the relevant row in Inventory. (3) Create a trigger “change_price” on table…