Microsoft PowerPoint – DS9 Discussion Session on MongoDB Amin Javari Aggregation • A MongoDB aggregation is a series of operators applied to a collection or a set of collections • Some operations in aggregation • Project • Lookup • Match • Group • Sort • Limit • Unwind • Skip • Count $lookup Yelp Database […]
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Assignment 3: XML and Database Due date: 2nd, June Submit a package of two files: Products.xml (1) and Queries.txt (2,3). Include your name and student ID. Consider the following relational data: pid Name Price Description 323 gizmo 22.99 great 233 gizmo plus 99.99 more features 312 gadget 59.99 good value Table 1: Products sid Name
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Introduction to Algorithms, Third Edition A L G O R I T H M S I N T R O D U C T I O N T O T H I R D E D I T I O N T H O M A S H. C H A R L E S
Part VI. Graph Algorithms I Chapter 22 Elementary graph algorithms I Chapter 23. Minimum spanning trees I Chapter 24. Single-source shortest paths I Chapter 25. All-pairs shortest paths Part VI. Graph Algorithms I Chapter 22 Elementary graph algorithms I Chapter 23. Minimum spanning trees I Chapter 24. Single-source shortest paths I Chapter 25. All-pairs shortest
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Overview In this assignment, you will first construct the basic building block of a table: Tuples. Next, you will implement a simple Catalog that keeps track of what tables are currently in the database and provides a way to access them. Finally, you will implement HeapFiles which are the physical representation of the data in
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Page 1 of 10 Table of Contents Part 1- Data Management: Spatial Queries …………………………………………………………………… 2 Exercise 1- Simple Spatial SQL ………………………………………………………………………………… 2 Exercise 2 – Combining Spatial and Non-Spatial Queries ……………………………………………. 3 Exercise 3 – Write Your Own Combined Queries ………………………………………………………… 4 Part 2- Working with 3D Data – DDL and DML ………………………………………………………………. 6 Part
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1 Spatial Data Management • Dr Claire Ellul • c.ellul@ucl.ac.uk Assignment Progress .. • By now you should have written your system specification and created the corresponding conceptual and logical ER Diagrams – (At least in draft format) ER Diagrams • An ERD is a model of the world, containing information of interest to the
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CS 411: Database Systems Fall 2018 Homework 2 (Due by 23:59 CDT on October 15) Logistics 1. The homework is due on Oct 15 23:59. We DO NOT accept late homework submissions. 2. You will be using Gradescope to submit your solutions. Answer each question “Part” on a new page and submit your solution as a single PDF file on Gradescope. The link to submission on GradeScope will be updated HERE soon. 3. Please write all answers electronically. We won’t grade handwritten/handdrawn versions. If you are looking for tools to create ERdiagrams etc, consider https://www.draw.io or GraphViz . 4. Feel free to talk to other members of the class in doing the homework. You should, however, write down your solutions yourself. If you’re finding yourself drawing ERdiagrams on a paper/board with a classmate, you’re going too far. List the names of everyone you worked with at the top of your submission. 5. Keep your solutions brief and clear. 6. Please use Piazza if you have questions about the homework but do not post answers. Feel free to use private posts or come to the office hours. Rubric 1. Always underline primary keys in ER/UML/Relations. 2. In the ER/UML, address as many constraints implied in the problem description as possible. Explicitly state any extra assumptions you assume that cannot be derived from the description. 3. When drawing ER or converting ER to relations, have the design principles in mind. a. Try not to create unnecessary entities. b. Try not to create tables that might suffer redundancy. https://www.draw.io/ https://www.graphviz.org/ Section 1. Concepts [20 pts] Part 1 [6 points] Given two entity sets : EA = {(a, 10), (b, 12), (c, 14), (d, 24)} and EB = {U, V, W, X, Y, Z}. We create a relationship set R = {((a, 10), W), ((c, 14), U), ((d, 24), V)}. Note we often refer to “relationship set” simply as “relationship”. Answer the following questions 1. Is R a oneone relationship (set)? Briefly explain your reasoning. 2. Is R a manyone relationship (set) from EA to EB? Briefly explain your reasoning. 3. Write a manyone relationship (set) R’ from EB to EA that contains as many relationships as possible. 4. What is the maximum number of relationships possible in a manymany relationship (set)
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Slide 1 Lecture 18 David Eccles Transactions INFO20003: Database Systems © University of Melbourne 2018 Today’s Session… -2- • Why we need user-defined transactions • Properties of transactions • How to use transactions • Concurrent access to data • Locking and deadlocking • Database recovery INFO20003: Database Systems © University of Melbourne 2018 What is
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Microsoft Word – Setup.docx Setup The code for this assignment has been pushed to the same repository that you forked for the previous assignment. That means all you need to do is sync your repository with the main repository. There are multiple ways to do this, perhaps the easiest way is to login to the
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