'Cartesian product' presentation slideshows

Module 5 Implementation of XQuery (Rewrite, Indexes, Runtime System)

Module 5 Implementation of XQuery (Rewrite, Indexes, Runtime System). XQuery: a language at the cross-roads. Query languages Functional programming languages Object-oriented languages Procedural languages Some new features : context sensitive semantics

1.82k views • 157 slides

ENM 503 Modeling Linear Systems

1.57k views • 150 slides

Week 6 October 3

Week 6 October 3. SQL: Joins, Set Operations, Aggregation Functions, Subqueries ANY/ALL and EXIST/NOT EXIST, Table Insert, Delete and Drop Oracle: Format Models, Substring, Truncation and Modulus Functions . Using DISTINCT. SELECT DISTINCT(manfuacturer_code) FROM products

947 views • 77 slides

RELATIONAL ALGEBRA

Lecture 7. RELATIONAL ALGEBRA. Prof. Sin-Min LEE Department of Computer Science. Terminology: table (relation) row (tuple) formally, a relation is a set of ordered n-tuples. Domain : set of data values from which an attribute value can be drawn. Eg. set of department names

720 views • 57 slides

Database Modelling

Database Modelling. Lecture 5: Data Manipulation 2 Nick Rossiter. Learning Objectives. To consider the algebraic Cartesian Product operator; To consider the algebraic Generalised Join operator; To consider the algebraic Natural Join operator.

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Laws of concurrent design

Laws of concurrent design. Tony Hoare Microsoft Research Cambridge FMCAD 2012 23 October. Summary. What are they? Are they useful? Are they true? Are they beautiful?. 1. Laws. Subject matter. (traces of) execution of a program recording a set of events,

663 views • 53 slides

RELATIONAL ALGEBRA (Chapter 2)

RELATIONAL ALGEBRA (Chapter 2). Overall Organization. Query Parser. Query Optimizer. Query Interpretor. Relational Algebra operators: ?, ?, ?, ?, ?, ?, ?, ?, ?. Index structures. Abstraction of records. Buffer Pool Manager. File System. RELATIONAL ALGEBRA INTRODUCTION.

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Partial Orders

Partial Orders. Section 8.6 of Rosen Fall 2008 CSCE 235 Introduction to Discrete Structures Course web-page: cse.unl.edu/~cse235 Questions : cse235@cse.unl.edu. Outline. Motivating example Definitions Partial ordering, comparability, total ordering, well ordering

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The Relational Language

The Relational Language. Todd S. Bacastow January 2005. History - Review. Introduced by Codd in 1970 and provides : a simple data structure for modelling all data mathematically based becoming a standard for implementation data models Consequences :

442 views • 34 slides

Relations

Relations. Binary Relations. a relation between elements of two sets is a subset of their Cartesian product (of ordered pairs). Note the di ?erence between a relation and a function: in a relation, each a ? A can map to multiple elements in B. Thus, relations are generalizations of functions.

509 views • 32 slides

Relations

Relations. Binary Relations. a relation between elements of two sets is a subset of their Cartesian product (of ordered pairs). Note the di ?erence between a relation and a function: in a relation, each a ? A can map to multiple elements in B. Thus, relations are generalizations of functions.

462 views • 32 slides

course: Database Systems ( A7B36DBS, Y36DBS, X36DBS )

course: Database Systems ( A7B36DBS, Y36DBS, X36DBS ). Lecturers: RNDr. Irena Mlynkova, Ph.D. & Mgr. Martin Necasky, Ph.D. Acknowledgement: The slides were kindly lent by Doc. RNDr. Tomas Skopal, Ph.D., Department of Software Engineering, Charles University in Prague.

418 views • 29 slides

lecture 3 : SQL - Queries

course: Database Systems ( A7B36DBS, Y36DBS, X36DBS ). lecture 3 : SQL - Queries. Lecturers: RNDr. Irena Mlynkova, Ph.D. & Mgr. Martin Necasky, Ph.D. Acknowledgement: The slides were kindly lent by Doc. RNDr. Tomas Skopal, Ph.D.,

435 views • 27 slides

Functions, Powersets , Languages

437 views • 23 slides

Section 7.1

Section 7.1. Relations and their properties. Binary relation. A binary relation is a set of ordered pairs that expresses a relationship between elements of 2 sets Formal definition: Let A and B be sets A binary relation from A to B is a subset of AxB (Cartesian product).

322 views • 19 slides

Relational Algebra

Relational Algebra. Agenda: - Mathematical basis of Data Manipulation - Relational Algebra operators. Data Manipulation Language. (a) All data in a relational DB is stored in tables (b) A normalized DB has many tables (c) Parts of some information we need is located in different tables

439 views • 19 slides

AND

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Ch. 4 Relational Algebra (2)

Ch. 4 Relational Algebra (2). Exercises. Queries in Ch.4 (p.161, p.166). Queries in Ch.4 (p.161, p.166). EMPL ( EmpNo , EmpName , Title, Manager, Salary, DNO) (p.161) DEPT ( DeptNo , DeptName , Floor) (p.166)

286 views • 14 slides

CS 157B Spring 2008

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Abstraction Mechanisms

Abstraction Mechanisms. Abstraction: A problem solving tool that allows one to think of a problem at a higher level without worrying about the details. Abstraction refers to organizing information based on three abstraction mechanisms: classification, generalization , and aggregation . .

265 views • 9 slides