8/25/2021 1 Introduction to Data Science Lecture 2 Data Science, Structured Data CIS 5930/4930 – Fall 2021 What is Data Science • Relatively new Computer Science field • Systems, algorithms, and processes for managing and deriving insights from heterogeneous and/or large data sets CIS 5930/4930 – Fall 2021 Typical Workflow for a Data Scientist CIS […]
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1/81 Week 3 Workshop 2/81 Housekeeping 1 Thank you again for providing us with your valuable feedback! 2 Refer to the post in Wattle News Forum for makeup information for the CECS teaching pause. 3 Assessment on SQL (Assignment 1) will be available on Wattle at 11:59pm on Aug 20 (Friday) and due at 11:59pm
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1/59 Week 8 Workshop – Query Processing and Optimisation 2/59 Housekeeping 1 Assignment 2 (Database Theory) for both COMP2400/6240 students: The submission deadline is 23:59, Oct 12, 2021. This assignment must be done individually (no group work). Please join the special drop-in sessions if you need any clarifications. 2 All the labs on Oct 4
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Entity-Relationship Model – Part 4 From ER to Relations Recap – Data Modeling Requirements ER diagram Relational database schema Relational DBMS Conceptual level Logical level Physical level ER design is subjective: There are many ways to model a given scenario. Analyzing alternative schemas is important. Constraints play an important role in designing a good database.
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Relational Algebra (Part 1) Two Questions 1 What is the difference between procedural and declarative languages? 2 What is the foundation for relational query languages like SQL? Why Relational Algebra? SQL is a (fairly) declarative query language: SQL queries describe the set of tuples you want to get. To be efficiently implemented, SQL queries need
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1 Introduction to Data Science Lecture 12 Machine Learning CIS 5930/4930 – Fall 2021 Assignments CIS 5930/4930 – Fall 2021 • Homework 1 • Posted on Canvas 9/10 • Due 9/17 at 3pm on Canvas What is Machine Learning Learning is any process by which a system improves performance from experience.” – Herbert Simon Definition
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1/50 Week 6 Workshop – Normalisation http://en.wikipedia.org/wiki/Ursus_Wehrli http://en.wikipedia.org/wiki/Ursus_Wehrli 2/50 Housekeeping Assignment 1 (SQL) (due 11:59pm, 3 Sep 2021) The mark and feedback will be released on 17 Sep 2021. An optional exercise website for our course https://cs.anu.edu.au/dab/bench/db-exercises/ An anonymous survey from our course representatives on Wattle (till 4 Sep under Week 6) Help us to
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1/56 Week 9 Workshop – Database Security 2/56 Qing Wang Website: http:// users.cecs.anu.edu.au/∼u5170295/ https:// graphlabanu.github.io/ website/ Zoom drop-in session: Tuesday 2pm-3pm (Week 10 to Week 12) Research areas: Data management and analytics Data mining Deep learning on graphs Graph algorithms. http://users.cecs.anu.edu.au/~u5170295/ https://graphlabanu.github.io/website/ 3/56 House Keeping Lab 8 (Database programming) in Week 10 is optional –
1/56 Week 9 Workshop – Database Security 2/56 Qing Wang Website: http:// users.cecs.anu.edu.au/∼u5170295/ https:// graphlabanu.github.io/ website/ Zoom drop-in session: Tuesday 2pm-3pm (Week 10 to Week 12) Research areas: Data management and analytics Data mining Deep learning on graphs Graph algorithms. http://users.cecs.anu.edu.au/~u5170295/ https://graphlabanu.github.io/website/ 3/56 House Keeping Lab 8 (Database programming) in Week 10 is optional –
Normalisation – Part 1 BCNF Schema Design A driving force for the study of dependencies has been schema design. The goal of schema design is to select the most appropriate schema for a particular database application. The choice of a schema is guided by semantic information about the application data provided by users and captured
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