'Duplicate tuples' diaporamas de présentation

SQL-99: SchemaDefinition, Constraints, and Queries and Views

SQL-99: SchemaDefinition, Constraints, and Queries and Views. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

893 views • 74 slides

Lecture-7 Chapter 8

Lecture-7 Chapter 8. SQL: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

812 views • 72 slides

Chapter 8

Chapter 8. SQL: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

807 views • 71 slides

Chapter 7

Chapter 7. SQL-99: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

900 views • 71 slides

Chapter 8

Chapter 8. SQL-99: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

839 views • 71 slides

Chapter 8

Chapter 8. SQL-99: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

820 views • 71 slides

Chapter 8

Chapter 8. SQL-99: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

839 views • 71 slides

Chapter 8

Chapter 8. SQL-99: Schema Definition, Basic Constraints, and Queries. Data Definition, Constraints, and Schema Changes. Used to CREATE, DROP, and ALTER the descriptions of the tables (relations) of a database. CREATE TABLE.

781 views • 69 slides

The Relational Model 1

CS 157 A Lecture 6 . The Relational Model 1. Prof. Sin-Min Lee Department of Mathematics and Computer Science. Prof. Sin-Min Lee Department of Computer Science. History of Relational Model. First proposed by a E.F. Codd in 1970. Codd proposed the Relational model in 1970.

1.01k views • 60 slides

SQL: The Query Language

744 views • 58 slides

SQL: The Query Language

709 views • 58 slides

Relational Algebra

Relational Algebra. Ch 7.4-7.6. Outline. Set Theoretic operations union, intersection, difference, Cartesian product Relational operations project, select, rename, join, division. Set Theoretic Operations. Set Operators union intersection difference Cartesian Product

726 views • 51 slides

SQL: Queries, Constraints, Triggers

SQL: Queries, Constraints, Triggers. Chapter 5. R1. Example Instances. S1. We will use these instances of the Sailors and Reserves relations in our examples. If the key for the Reserves relation contained only the attributes sid and bid , how would the semantics differ?. S2.

819 views • 51 slides

567 views • 41 slides

Republishing Mechanisms for R-GMA

Republishing Mechanisms for R-GMA. Benefits and Approaches. Talk by: Alasdair Gray Collaborators: Andy Cooke, Lisha Ma, and Werner Nutt Heriot-Watt University. Summary. Current situation in R-GMA. Example of a republisher hierarchy that users want.

452 views • 30 slides

Relational Databases

Relational Databases. Prepared for SYS364 Systems Design by Joyce Walton. Relational Databases. In the beginning: Hierarchical and Network DBMS were awkward to design, and hopelessly unreliable

381 views • 24 slides

325 views • 24 slides

Fundamentals of Relational Database

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Relational Database Management System

Relational Database Management System . A type of database in which records are stored in relational form is called relational database management system. Relational Data Structure. Relation Attribute Domain Tuple Degree Cardinality Relational database. Relational Data Structure.

566 views • 17 slides

Bags, foreign keys, selects, joins, and yes, btw, SVN

Bags, foreign keys, selects, joins, and yes, btw, SVN. 2/18/2014. SVN - Subversion. The subversion server is student.cs.jmu.edu /cs474/ groupName . I have placed into each groups canvas, the name of the group which will be the folder and the password. Change the password.

226 views • 15 slides