Embedded SQL Author: Diane Horton with examples from Ullman and Widom Problems with using interactive SQL • Standard SQL is not “Turing-complete”. • E.g., Two profs are “colleagues” if they’ve co-taught a course or share a colleague. • We can’t write a query to find all colleagues of a given professor because we have no […]
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CSC343 Test 3 Question Fall 2020 [11 marks] Below is an Entity-Relationship diagram for the music industry. It may or may not represent the domain well. trackName trackID duration (1,N) (1,N) features albumID (1,N) produces (0, N) name name (1,1) fees manages releaseDate name (0,1) phone manager Track appearsOn order role Album (1,1) (1,N) RecordCompany
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University of Toronto CSC343, Winter 2021 SQL Data Definition Language: Solutions 1. Which of the following table definitions are valid? Where invalid, explain why. create table Stuff1 ( name text primary key, number int, rating float not null ); create table Stuff3 ( name text primary key, number int unique default 0, rating float );
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FIT1050 Web Fundamentals Web Servers and Server-Side Scripting Copyright Warning Copyright By PowCoder代写 加微信 powcoder Commonwealth of Australia Copyright Act 1968 This material has been reproduced and communicated to you by or on behalf of Monash University in accordance with section 113P of the Copyright Act 1968 (the Act). The material in this communication may
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Introduction Relational Algebra Examples Conclusion Relational Algebra (RA) Week 7 – CSC 343 Michael Liut & Ilir Dema Department of Mathematical and Computational Sciences University of Toronto Mississauga March 4/5, 2021 Michael Liut & Ilir Dema University of Toronto: CSC 343 1 / 31 Introduction Relational Algebra Examples Conclusion Intended Learning Outcomes After today, you
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SQL: Data Manipulation Language CSC 343 Winter 2021 MICHAEL LIUT (MICHAEL.LIUT@UTORONTO.CA) ILIR DEMA (ILIR.DEMA@UTORONTO.CA) DEPARTMENT OF MATHEMATICAL AND COMPUTATIONAL SCIENCES UNIVERSITY OF TORONTO MISSISSAUGA Why SQL? SQL is a very-high-level language. ◦ Structured Query Language ◦ Say “what to do” rather than “how to do it.” ◦ Avoid a lot of data-manipulation details needed in
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SQL: Data Definition Language CSC 343 Winter 2021 MICHAEL LIUT (MICHAEL.LIUT@UTORONTO.CA) ILIR DEMA (ILIR.DEMA@UTORONTO.CA) DEPARTMENT OF MATHEMATICAL AND COMPUTATIONAL SCIENCES UNIVERSITY OF TORONTO MISSISSAUGA Database Schemas in SQL SQL is primarily a query language, for getting information from a database. ◦ DML: Data Manipulation Language But SQL also includes a data-definition component for describing database
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Introduction to Databases CSC 343 Winter 2021 MICHAEL LIUT (MICHAEL.LIUT@UTORONTO.CA) ILIR DEMA (ILIR.DEMA@UTORONTO.CA) DEPARTMENT OF MATHEMATICAL AND COMPUTATIONAL SCIENCES UNIVERSITY OF TORONTO MISSISSAUGA Let’s look at the course syllabus! What does this course look like?! 2 Topics • Relational Model • ER Model • SQL • Aggregation and Joins • Constraints and Triggers • Relational
Week 6: Lecture Recap CSC 343 Winter 2021 MICHAEL LIUT (MICHAEL.LIUT@UTORONTO.CA) ILIR DEMA (ILIR.DEMA@UTORONTO.CA) DEPARTMENT OF MATHEMATICAL AND COMPUTATIONAL SCIENCES UNIVERSITY OF TORONTO MISSISSAUGA Michael Liut CSC343, Winter 2018 University of Toronto Count Table of Contents Summation Grouping Aggregation Average Minimum and Maximum Ordering Michael Liut 2 CSC343, Winter 2021 University of Toronto Aggregation There
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Relational Model CSC 343 Winter 2021 MICHAEL LIUT (MICHAEL.LIUT@UTORONTO.CA) ILIR DEMA (ILIR.DEMA@UTORONTO.CA) DEPARTMENT OF MATHEMATICAL AND COMPUTATIONAL SCIENCES UNIVERSITY OF TORONTO MISSISSAUGA Describing Data: Data Models A data model is a collection of concepts for describing data. A schema is a description of a particular collection of data, using a given data model. The relational
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