Given the following scheme, what kind of key is (VIN) (check all that apply)? automobile_scheme = {VIN, license_plate_state, owner_last_name, owner_first_name, license_plate_number, color, model, make, year} • color is a simple name, like 'blue' to describe the predominant color of the vehicle. • VIN is the vehicle identification number. No two vehicles in the world have the same VIN. • License plate numbers are only unique within a state. There could be more than one automobile with the same license plate number, as long as they are registered in different states. • Make is the manufacturer - like Chevrolet. • Model is the name of the vehicle - like Toyota Prius. • Year is the year that the automobile was made. ✓candidate key external key minor key ✓superkey

Given the following scheme, what kind of key is (VIN) (check all that apply)? automobile_scheme = {VIN, license_plate_state, owner_last_name, owner_first_name, license_plate_number, color, model, make, year} • color is a simple name, like 'blue' to describe the predominant color of the vehicle. • VIN is the vehicle identification number. No two vehicles in the world have the same VIN. • License plate numbers are only unique within a state. There could be more than one automobile with the same license plate number, as long as they are registered in different states. • Make is the manufacturer - like Chevrolet. • Model is the name of the vehicle - like Toyota Prius. • Year is the year that the automobile was made. ✓candidate key external key minor key ✓superkey

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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In java create an application to manage your data base information the database is already created in mysql tables, the tables are fill, So the user can use your database application user friendly Retrieve all data: Given a table name, retrieve all data from the table and present it to the user. Average: Given a table name and a column name, return the average of the column. Here the assumption is that the column type will be numeric (e.g., cost column). Insert: Given a table name, your program should show the column names of that table and ask the users to input new data to the table. In case of errors, your program should directly show the MySQL errors to the users. Assumption 1: Users will enter data according to the database constraints. Assumption 2: Users will input one record at a time. Delete: Given a table name, your program should show the column names of that table and ask the users to input data that they want to delete. Assumption 1: Users will enter data according to the…
keys = ['name', 'last', 'job_title', 'email']Faculty2 = Faculty = dict.fromkeys(keys)print(Faculty2) Use the dictionaries that you created for faculty members. Be sure that all the dictionaries have the same keys: name, last name, etc. If there are keys or values missing, add them. If you do not have the value, you can use 'n/a' or 'TBD'. Make a list of the dictionaries. Loop the list to print all the information available to each faculty member. In Python lang please.
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2. Get the Groups As new students begin to arrive at college, each receives a unique ID number, 1 to n. Initially, the students do not know one another, and each has a different circle of friends. As the semester progresses, other groups of friends begin to form randomly. There will be three arrays, each aligned by an index. The first array will contain a queryType which will be either Friend or Total. The next two arrays, students1 and students2, will each contain a student ID. If the query type is Friend, the two students become friends. If the query type is Total, report the sum of the sizes of each group of friends for the two students.
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SQL A table Products have: a name (TEXT) a description (TEXT) a unit cost stored in cents (INTEGER) and of course we also add an id column to identify them. Separately, we'd like to track the number of items in stock for each product. To do so we'll have a store and an inventory table. Stores have just an id and a name. Then, our inventory table should combine stores and products, listing how much of each product each store has in stock. a product_id (INTEGER) a store_id (INTEGER) a quantity (INTEGER) in stock Now we can insert some stores, products and inventory into our database. There are 2 stores -- one called NY and one called NJ. There are 2 products we are concerned with. Their names are sneakers, costing $220 (remember this is dollars!) and boots costing $350. Use any description for each that you'd like. NY has 4 sneakers in stock and 3 boots. NJ has 5 sneakers in stock and no boots. Insert the above data into the tables you have created.
what is idNum variable ?
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Q1 ): You are about to design a university database to keep information about departments, professors, and course offerings. Here is what you have been told about this application. Departments are identified by a code (e.g. CSE) and have a name (e.g., "Computer Science and Engineering"). Professors are identified by their initials (like "MNK1"), they have a name, and they are affiliated with at least one department. Professors are either tenured ("tenured" means permanent) or junior (they have to be in one of these categories and they cannot be in both). For tenured professors we want to know the year they earned tenure (year when they became permanent) and for junior professors we want to know the date they were hired. Finally, a department has exactly one chairperson who must be a tenured professor in any department (i.e., there is no requirement that the chairperson is affiliated with the department s/he chairs). A department (e.g., CSE) lists courses to be offered to students for…