'Green boats' diaporamas de présentation

SQL: Queries, Constraints, Triggers

SQL: Queries, Constraints, Triggers. Chapter 5. SQL. Data Manipulation Language (DML): subset of SQL which allows users to create queries and to insert , delete and modify rows .

432 views • 41 slides

Relational Algebra

p. Relational Algebra. CS 186 Spring 2006, Lecture 8 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).

385 views • 30 slides

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

392 views • 26 slides

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.

267 views • 26 slides

Database Management Systems Chapter 4

262 views • 25 slides

Relational Algebra

Relational Algebra. Chapter 4, Part A. Modified by Donghui Zhang. 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.

286 views • 22 slides

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

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.

260 views • 21 slides

Algebra

Algebra is a mathematical tool

214 views • 21 slides

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.

213 views • 21 slides

Relational Algebra

Relational Algebra. 198:541 Rutgers University. 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.

216 views • 21 slides

Relational Algebra

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. Allows for much optimization. Query Languages != programming languages!

213 views • 21 slides

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.

214 views • 21 slides

Relational Algebra & Calculus

252 views • 8 slides