2.14 LAB - Alter Movie table The Movie table has the following columns: • ID - positive integer • Title - variable-length string • Genre - variable-length string • RatingCode - variable-length string • Year - integer Write ALTER statements to make the following modifications to the Movie table: 1. Add a Producer column with VARCHAR data type (max 50 chars). 2. Remove the Genre column. 3. Change the Year column's name to Release Year, and change the data type to SMALLINT.

2.14 LAB - Alter Movie table The Movie table has the following columns: • ID - positive integer • Title - variable-length string • Genre - variable-length string • RatingCode - variable-length string • Year - integer Write ALTER statements to make the following modifications to the Movie table: 1. Add a Producer column with VARCHAR data type (max 50 chars). 2. Remove the Genre column. 3. Change the Year column's name to Release Year, and change the data type to SMALLINT.

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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Part C - advanced file reading You will need a Python repl to solve part C. Define a Python function named expensive_counties that has two parameters. The first parameter is a string representing the name of a text file. Each line of this text file will be a state code. The second parameter is a string representing the name of a CSV file. The CSV file will be portion of the US government's dataset documenting median rents in each US county. Each row in the CSV file has the format: Area Name, Efficiency, 1-Bedroom, 2-Bedroom, 3-Bedroom, 4-Bedroom, State Code Your function will need to use the accumulator pattern to return a new list. You will need to add to this list the Area Name from every row that meets 2 criteria: (1) The state code (the column at index 6) was a line in the text file named in the first parameter; AND (2) The median rent on a 1-bedroom apartment (the column at index 2) is over 1000. Important Hints: * You will really, really want to use the built-in csv library…
Given variable cities = {'GA' : 'Atlanta', 'NY' : 'Albany', 'CA' : 'San Diego'} write statement to delete then add an element to cities, so value of citiesbecomes {'CA': 'San Diego', 'NY': 'Albany', 'IN': 'Indiana'} Note: the order of the display of entries in a dictionary are not in a specific order.)
MongoDB 1) The customers collection includes documents that have accounts as a field that contains an array of values. Write a statement to retrieve a cursor containing all documents where there is only one account. 2) Write a statement that returns only the email addresses of all customer documents. 3) Write a statement to retrieve a cursor containing all customer documents where the active field within the main document (i.e., do not worry about nested documents) is set to true. 4) Write a statement to retrieve a cursor containing all customer documents that do not have the active field within the main document (i.e., do not worry about nested documents). (Hint: Take a look at the Query and Projection operators in the MongoDB documentation to find an operator that helps determine whether a field exists within a document.)
Menu option C The program reads in data from HowManyHours.txt, displays a report header with the report creator’s name, employee id, and department and who they created the report for. The body of the report displays the total number of students who used the program, the average credits taken, and the average study hours. In the following format –STUDY HOURS REPORT Created for Dr. Payne, A004567893 Dept: Computer Science Created By: Karen Smith, A00494928Dept: Advising Total Students: 3Average Credits: 9.00Average Study Hours: 20.00Menu option DThank the user for using the programTerminates the program
Write a statement that assigns the number 7 to the element located in the third row, first column in the intQuantities array.
Twitter Data: twitter_url = 'https://raw.githubusercontent.com/Explore-AI/Public-Data/master/Data/twitter_nov_2019.csv'twitter_df = pd.read_csv(twitter_url)twitter_df.head() Question: Write the Number of Tweets per Day Write a function which calculates the number of tweets that were posted per day. Function Specifications: It should take a pandas dataframe as input. It should return a new dataframe, grouped by day, with the number of tweets for that day. The index of the new dataframe should be named Date, and the column of the new dataframe should be 'Tweets', corresponding to the date and number of tweets, respectively. The date should be formated as yyyy-mm-dd, and should be a datetime object. Hint: look up pd.to_datetime to see how to do this.
You will write a program that allows the user to enter 10 songs and their artists into a playlist and will sort the entries by artist order. The program should use a 10 element array of structure objects that holds two string variables: artist and title. Once the data has been read in and stored, it should sort the entries in ascending order by artist. It should then display the sorted array with appropriate headings. Modularity: The main function should create the Playlist object and call at least three other functions: 1. Get the data from the user. Using a loop, have the user populate the playlist object array with 10 artist and songs in no particular order. No validation is necessary. However, you should use the C++ getline function instead of cin so that the user can type spaces in the name and song title. 2. Sort the list. You may use either the bubble sort or the selection sort to sort your playlist. 3. Display the list. The function should display the artist and title in sorted…
1-24 Complete the following code. Ignore any highlighted answers, those are all not correct. thank you
3. Create a sequence that generates integers starting with the value 5. Each value should bethree less than the previous value generated. The lowest possible value should be 0, andthe sequence shouldn’t be allowed to cycle. Name the sequence MY_FIRST_SEQ.
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The commands to create a data item using <- is the same as = in R. A) True B) False
State True/False: A set may contain a specific value more than once, however, only unique value will be stored. True False