CS377: Database Design - Database Programming (100 Points)

Assignment Goals

The goals of this assignment are:
  1. To manipulate databases through a programmatic interface
  2. To utilize SQL libraries in a programming language

Background Reading and References

Please refer to the following readings and examples offering templates to help get you started:

The Assignment

In this assignment, you will connect to a web or local database engine and write a program to execute SQL commands on that engine.

Connecting to the Database

You can either install the MySQL database engine locally, use a web-based database engine like Fauna, or connect to a database on a web-based data repository such as bit.io. Each option will provide you with connection details for the database, including a username, password, hostname, port number, and possibly a connection string that includes all of this information in a single URI. You may also use sqlite using the sqlite3 library

Import the appropriate library for the database engine you are using (for example, bit.io uses PostgreSQL), and write a program that implements a database schema of your choosing. You can be creative here! Your schema should have at least three tables with relationships to other tables via foreign keys, and at least one of those relationships should be 1:many. Draw you schema before implementing it.

Your implementation should use a class structure to model each table, and that class should include a method that returns a string with SQL code including the field values you wish to insert into your database.

Execute each statement to create and insert records into your database. I recommend reading the data to insert from a text file so that you can test repeatedly very quickly!

Finally, include at least three aggregated queries (mathematical aggregations, joins, etc) across your tables. Use a loop to iterate over the result set and print the results to the screen in a meaningful way.

Exporting your Project for Submission

When you’re done, write a README for your project, and save all your files, before exporting your project to ZIP. In your README, answer any bolded questions presented on this page.

Submission

In your submission, please include answers to any questions asked on the assignment page in your README file. If you wrote code as part of this assignment, please describe your design, approach, and implementation in your README file as well. Finally, include answers to the following questions:
  • If collaboration with a buddy was permitted, did you work with a buddy on this assignment? If so, who? If not, do you certify that this submission represents your own original work?
  • Please identify any and all portions of your submission that were not originally written by you (for example, code originally written by your buddy, or anything taken or adapted from a non-classroom resource). It is always OK to use your textbook and instructor notes; however, you are certifying that any portions not designated as coming from an outside person or source are your own original work.
  • Approximately how many hours it took you to finish this assignment (I will not judge you for this at all...I am simply using it to gauge if the assignments are too easy or hard)?
  • Your overall impression of the assignment. Did you love it, hate it, or were you neutral? One word answers are fine, but if you have any suggestions for the future let me know.
  • Any other concerns that you have. For instance, if you have a bug that you were unable to solve but you made progress, write that here. The more you articulate the problem the more partial credit you will receive (it is fine to leave this blank).

Assignment Rubric

Description Pre-Emerging (< 50%) Beginning (50%) Progressing (85%) Proficient (100%)
Algorithm Implementation (60%) The algorithm fails on the test inputs due to major issues, or the program fails to compile and/or run The algorithm fails on the test inputs due to one or more minor issues The algorithm is implemented to solve the problem correctly according to given test inputs, but would fail if executed in a general case due to a minor issue or omission in the algorithm design or implementation A reasonable algorithm is implemented to solve the problem which correctly solves the problem according to the given test inputs, and would be reasonably expected to solve the problem in the general case
Code Quality and Documentation (30%) Code commenting and structure are absent, or code structure departs significantly from best practice, and/or the code departs significantly from the style guide Code commenting and structure is limited in ways that reduce the readability of the program, and/or there are minor departures from the style guide Code documentation is present that re-states the explicit code definitions, and/or code is written that mostly adheres to the style guide Code is documented at non-trivial points in a manner that enhances the readability of the program, and code is written according to the style guide
Writeup and Submission (10%) An incomplete submission is provided The program is submitted, but not according to the directions in one or more ways (for example, because it is lacking a readme writeup or missing answers to written questions) The program is submitted according to the directions with a minor omission or correction needed, including a readme writeup describing the solution and answering nearly all questions posed in the instructions The program is submitted according to the directions, including a readme writeup describing the solution and answering all questions posed in the instructions

Please refer to the Style Guide for code quality examples and guidelines.