System Software HPC ARCHITECTURES Filesystems and Data Hardware Adrian Jackson a. .ac.uk I/O • I/O essential for all applications/codes • Some data must be read in or produced • Instructions and Data • Key for data analysis • Basic hierarchy • CPU – Cache – Memory – Devices (including I/O) • Often “forgotten” for HPC […]
ExamWithSolution CS 4320 Fall 2019 Final Exam Page � of �2 15 Part A) SQL Queries. (20 points) Consider the database schema created by the following SQL commands: CREATE TABLE Sailors (sid integer PRIMARY KEY, sname varchar(20), rating integer, age real); CREATE TABLE Boats (bid integer PRIMARY KEY, bname varchar(20), color varchar(20)); CREATE
Microsoft Word – FinalExamStudyGuidesFall2021.docx DS/CMPSC 410 Programming Models for Big Data Fall 2021 Final Exam Study Guide December 6, 2021 The weight of each topic is an estimate. The actual weight of exam questions can vary slightly. A question in the exam can also related to more than one topic areas. 1. Big Data Opportunities,
DTA (M) Database Theory & Applications Lab 7 Tasks: Solutions [ADVANCED] Task 1: Advanced SQL SELECT Statements There are proposed solutions on the SQL selection queries. SQL 1: SELECT Owner.name, Owner.ownerid, COUNT(Dog.dogid) FROM Owner, Dog WHERE Owner.ownerid = Dog.ownerid GROUP BY Owner.ownerid HAVING COUNT(Dog.dogid) >= 8 ORDER BY Owner.name SQL 2: SELECT Kennel.kennelname, COUNT(Dog.dogid) FROM
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File Structures CONTEXTUAL DATABASE & CONCEPTUAL MODELLING Database Theory & Applications (M) Dr Chris Anagnostopoulos ROADMAP Database in context Database System abstract architectural view Families of Data Focus on structured-data Entity-Relationship Conceptual Model Prof Peter Chen (CMU) invented the ER model; 1976 {Entities, Attributes, Relationships, Semantics} Examples
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examstyle Thursday, 27 April 2017 2.00 pm – 3.30 pm (Duration: 1 hour 30 minutes) DEGREES of MSc in Information Technology, MSc in Software Development Database Theory and Applications (Answer All Questions) This examination paper is worth a total of 60 marks The use of a calculator is not permitted in this examination INSTRUCTIONS TO
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examstyle Wednesday 28 April 2018 2.00 pm – 3.30 pm (Duration: 1 hour 30 minutes) DEGREES OF MSc, MSci, MEng, BEng, BSc,MA and MA (Social Sciences) Database Theory and Applications M (Answer All Questions) This examination paper is worth a total of 60 marks The use of a calculator is not permitted in this examination
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Relational Algebra RELATIONAL ALGEBRA Database Theory & Applications (M) Dr Chris Anagnostopoulos ROADMAP Objective: explore what is inside a Database System …from what to do going to how to do List different strategies for SQL processing Relational Algebra Challenge: Transform SQL into Relational Expression Challenge: Transform Relational Expression into
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DTA (M) Database Theory & Applications Lab 5 Tasks Task 1: Set up a Database Account 1.1 Connect with the PostgreSQL Server PostgreSQL system is a Client-Server system, i.e.: • Many databases, each having multiple tables, reside on a single machine. • This machine runs a server process, which manages all database access. • Other
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Example Exam Paper DTA(M) Part A: Relational Modelling Question 1. (a) Provide a formal definition of the Super Key and the Primary Key in a relation R; Answer: Slide 16/Lecture: Relational Model (b) Provide an example for the super key and for the primary key. Answer: Slide 16/Lecture: Relational Model Question 2. (a) Provide a
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