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Keeping your skills current in today's world is becoming increasingly challenging. There are too many new technologies being developed, and little time to learn them all. The DB2® on Campus Book Series has been developed to minimize the time and effort required to learn many of these new technologies. This book helps new database professionals understand database concepts with the right blend of breadth and depth of information.
282 p dtu 11/12/2012 206 2
Từ khóa: Database Fundamentals, cơ sở dữ liệu, information models, mô hình thông tin, relational data models, mô hình dữ liệu
The relational model for database management is a database model based on first-order predicate logic, first formulated and proposed in 1969 by Edgar F. Codd.In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database. The purpose of the relational model is to provide a declarative method for specifying data and...
12 p dtu 23/10/2012 197 1
Từ khóa: Exercises Relational Model, SQL Server, ngôn ngữ SQL, kỹ thuật máy tính, phần mềm máy tính, kỹ năng dữ liệu
The relational model represents the database as a collection of relations. Informally, each relation resembles a table of values or, to some extent, a "flat" file of records. For example, the database of files that was shown in Figure 01.02 is considered to be in the relational model. However, there are important differences between relations and files, as we shall soon see. When a relation is thought of as a table of values, each row in the...
46 p dtu 11/10/2012 234 2
Từ khóa: relational model, Cơ sở dữ liệu, hệ quản trị cơ sở dữ liệu, cấu trúc thông tin, kỹ thuật dữ liệu, an toàn dữ liệu, liên kết dữ liệu
Fundamentals of relational database management systems
Information is a valuable resource to an organization. Computer software provides an efficient means of processing information, and database systems are becoming increasingly common means by which it is possible to store and retrieve information in an effective manner. This book provides comprehensive coverage of fundamentals of database management system. This book is for those who wish a better understanding of relational data modeling, its...
362 p dtu 22/09/2012 222 4
Từ khóa: cơ sở dữ liệu, hệ quản trị cơ sở dữ liệu, relational database, management systems, quản trị máy tính, computer software, processing information, relational data model