3. Let us consider the file with employees:titleMechanicsLibrarianGardenernamePeterNorbertID120150170age302335salary120001100010000KaiPlease do the following:a. create a data type (record) that contains the six(6) data fieldsb. print the recordc. store itd. update the salarye. scan the record according to their salaryf. print the data with sorting on ageGroupJo, GeorgeAnn, EliMary, Terry

a. One way to create a record type in Python is to use the namedtuple class from the collections…

Answered: 3. Let us consider the file with…

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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Access Assignment Problem: JMS TechWizards is a local company that provides technical services to several small businesses in the area. The company currently keeps its technicians and clients’ records on papers. The manager requests you to create a database to store the technician and clients’ information. The following table contains the clients’ information. Client Number Client Name Street City State Postal Code Telephone Number Billed Paid Technician Number AM53 Ashton-Mills 216 Rivard Anderson TX 78077 512-555-4070 $315.50 $255.00 22 AR76 The Artshop 722 Fisher Liberty Corner TX 78080 254-555-0200 $535.00 $565.00 23 BE29 Bert's Supply 5752 Maumee Liberty Corner TX 78080 254-555-2024 $229.50 $0.00 23 DE76 D & E Grocery 464 Linnell Anderson TX 78077 512-555-6050 $485.70…
Using the data file below design a hierarchical struct to organize the data. Then declare an array of structs for the reservations. The data file contains ten reservations. There are 8 columns of data: party name, size, date and time for the reservation, phone number, email address, credit card number and expiration date for the credit card. The data can be read from the file below so you will not need to type it in repeatedly. Once you have populated the array with data perform the following tasks: Write a function that will print out to the screen the information for one reservation.In the main program write code that prompts the user to enter a date in the form MM DD YYYYCall the function to print out all reservations on that date. You can make a loop that calls the print function repeatedly or you can put that code inside the print function.TEST CASES: April 30, 2023 and May 12, 2023. In this example you need to carefully consider what data types to use. For example, the credit…
Question 5 Assume you are given a dictionary student_dict with Mary taking ACT101, FIN202, MIS310 and MIS340, Steve is enrolled in FIN202, MKT300 and MIS310, and Paul is registered for ACT101 and MKT300. With Ist initially set to an empty list, which of the following would complete the code that will correctly produce the list of students taking MIS courses. for key in student_dict: for val in student_dict [key]: if 'MIS' in 1st.append( and O val; val; 1st; key O val; val; 1st; val O val; key; 1st; val O val; key; 1st; key Question 6 0.5 pts not in 0.5 pts Given the customer reviews shown below, which one of the following would correctly display the first company's name XYZ, Inc.? + 100% O KH
The file london_weather.csv contains weather data for the years 1979 to 2020. The first five lines of this file are: date,cloud_cover,sunshine,global_radiation,max_temp,mean_temp,min_temp,precipitation,pressure,snow_depth19790101,2,7,52,2.3,-4.1,-7.5,0.4,101900,919790102,6,1.7,27,1.6,-2.6,-7.5,0,102530,819790103,5,0,13,1.3,-2.8,-7.2,0,102050,419790104,8,0,13,-0.3,-2.6,-6.5,0,100840,2 Note, in particular, that the dates are given as eight-digit integers in the format YYYYMMDD. There appears to be some inconsistencies in this data, as there are rows for which the column max_temp contains an entry that is smaller than the corresponding entry in min_temp. Write a Python function wrong_temperature(year) that returns the number of days in a given year for which the column max_temp contains an entry that is smaller than the corresponding entry in the column min_temp.
Using the data file below design a hierarchical struct to organize the data. Then declare an array of structs for the reservations. The data file contains ten reservations. There are 8 columns of data: party name, size, date and time for the reservation, phone number, email address, credit card number and expiration date for the credit card. The data can be read from the file below so you will not need to type it in repeatedly. Once you have populated the array with data perform the following tasks: Write a function that will print out to the screen the information for one reservation.In the main program write code that prompts the user to enter a date in the form MM DD YYYYCall the function to print out all reservations on that date. You can make a loop that calls the print function repeatedly or you can put that code inside the print function.TEST CASES: April 30, 2023 and May 12, 2023. In this example you need to carefully consider what data types to use. For example, the credit…
Exercise: Check Monster Character Exists Description In this series of exercises, you will create functions to create, modify and examine dictionaries that represent characters in an animated film, and the cast members who voice the characters. The keys of the dictionary will be character names. The values in the dictionary will be voice actor names. For this exercise, you will create a function that checks if a character is already in the dictionary. Files monsterfunctions.py : set of functions to work with monster cast dictionaries. Function Name has_character Parameters monsters: a dictionary character: a string, the name of a character Action Checks if character is a key in monsters. Return Value True if character is a key in monsters, otherwise False. Examples monsters = create_monster_cast() monsters = add_cast_member(monsters, "Mike", "William Crystal") has_character(monsters, "Mike") -> True has_character(monsters, "Sully") -> False
COLLEGE (CollegeName, ZipCode, CarnegieClass)LECTURER (LectureID, Name, Email, PhoneNumber)EXPERTISE (TopicOfExpertise, LevelOfExpertise, LecturerID)CONTRACT (ContractDate, CollegeName, LecturerID, Salary)ZIP (ZipCode, City, State) Also assume that there are frequent queries involving the following information:a. List of colleges sorted by zip code.b. Access to information on a specific lecturer—their name, email address, and phone number.c. List of lecturers sorted by their area of expertise and within each area of expertise, their expertise level.d. List of colleges sorted by their CarnegieClass and within the CarnegieClass by zip code.e. Access to information on a specific lecturer based on their email address. For each situation above, specify the types of index(es) you would recommend. Justify your decisionsbased on the given relational model.
22. The primary key is selected from the: a. composite keys b. determinants c. candidate keys d. foreign keys

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