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Database Management Systems Session 5

Database Management Systems Session 5. Instructor: Vinnie Costa vcosta@optonline.net. Term Paper. Due Saturday, Oct 8 Should be about 3-4 pages (9 or 10 font) Some people still have not submitted topics. Homework. Read Chapter Three No exercises for next class; MidTerm instead

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Relational Algebra

Relational Algebra. Chapter 4, Part A. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic. Allows for much optimization.

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SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. Instructor: Mirsad Hadzikadic. R1. Example Instances. S1. We will use these instances of the Sailors and Reserves relations in our examples.

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Relational Algebra and Calculas

Relational Algebra and Calculas. Chapter 4, Part A. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic. Allows for much optimization.

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Relational Algebra & Calculus

Relational Algebra & Calculus. S. MUTHU KRISHNAN Department of Computer Science. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic.

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Relational Algebra & Calculus

Relational Algebra & Calculus. Chapter 4, Part A (Relational Algebra). Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic.

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Relational Algebra

Relational Algebra. Chapter 4. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on algebra/logic. Allows for much optimization.

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Relational algebra

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Relational Algebra

p. Relational Algebra. R & G, Chapter 4. By relieving the brain of all unnecessary work, a good notation sets it free to concentrate on more advanced problems, and, in effect, increases the mental power of the race . -- Alfred North Whitehead (1861 - 1947). Relational Query Languages.

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Relational Algebra

Relational Algebra. Lecture 4. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on logic. Allows for much optimization.

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Relational Algebra

Relational Algebra. Chapter 4. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful QLs: Strong formal foundation based on algebra/logic. Allows for much optimization.

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ICS 321 Spring 2011 The Relational Model of Data

ICS 321 Spring 2011 The Relational Model of Data. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Data Models. A data model is a collection of concepts for describing data Structure of the data.

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CS4432: Database Systems II

CS4432: Database Systems II. Lecture #13. Professor Elke A. Rundensteiner. Query Processing. Query in SQL ? Query Plan in Algebra. Example. Data: relation R (A, B, C) relation S (C, D, E) Query: SELECT B, D FROM R, S

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Relational Algebra

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Query-by-Example (QBE)

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Query-by-Example (QBE)

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Query-by-Example (QBE)

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Relational Algebra

Relational Algebra. Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database. Relational model supports simple, powerful query languages: Strong formal foundation based on logic. Allows for much optimization.

317 views • 21 slides

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Relational Algebra & Calculus

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