Relational database systems

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  • Database management systems are now an indispensable tool for managing information, and a course on the principles and practice of database systems is now an integral part of computer science curricula. This book covers the fundamentals of modern database management systems, in particular relational database systems. We have attempted to present the material in a clear, simple style. A quantitative approach is used throughout with many detailed examples.

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  • In Ebook Principles of Distributed Database Systems defines the fundamental concepts and set the framework for discussing distributed databases. We start by examining distributed systems in general in order to clarify the role of database technology within distributed data processing, and then move on to topics that are more directly related to DDBS.

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  • Ebook "Database System Concepts" present on: Relational databases, database design, data storage and querying, transaction management, system architecture, data warehousing, data mining, and information retrieval,...

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  • System R itself was never produced commercially, but directly led to the development of SQL/DS (1981 running under DOS/VE OS, a VM version followed in 1982) which was IBM’s first commercial relational DBMS. • IBM however, did not produce the first commercial implementation of a relational DBMS. That honor went to Oracle (Relational Software) in 1979. • Today, the relational DBMS system of virtually all vendors is based on SQL. • Each vendor provides all the standard features of SQL. Most vendors also provide additional features of their own, called extensions to standard SQL.

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  • Chapter 7 presents the following content: Informal design guidelines for relational databases, semantics of the relation attributes, redundant information in tuples and update anomalies, null values in tuples, introduction to normalization, first normal form, second normal form, third normal form, BCNF (boyce-codd normal form),...

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  • Chapter 5 - Relational database design by ER and EER-to-relational mapping. This chapter includes contents: Mapping of regular entity types, mapping of weak entity types, mapping of binary 1:1 relation types, mapping of binary 1:N relationship types, mapping of binary M:N relationship types, mapping of multivalued attributes, mapping of N-ary relationship types, options for mapping specialization or generalization, mapping of union types (categories).

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  • Chapter 7 discusses how to design a relational database schema based on a conceptual schema design. This chapter presented a high-level view of the database design process, and in this chapter we focus on the logical database design or data model mapping step of database design. We present the procedures to create a relational schema from an Entity-Relationship (ER) or an Enhanced ER (EER) schema.

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  • After studying this chapter, you should be able to: Explain the importance and advantages of databases, as well as the difference between database systems and file-based legacy systems; explain the difference between logical and physical views of a database; explain fundamental concepts of database systems such as DBMS, schemas, the data dictionary, and DBMS languages;...

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  • In this chapter, the learning objectives are: Integrate separate REA diagrams for individual business cycles into a single, comprehensive organization-wide REA diagram; build a set of tables to implement an REA model of an AIS in a relational database; explain how to write queries to retrieve information from an AIS relational database built according to the REA data model.

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  • The object-relational model, described in chapter 9, combines features of the re-lational and object-oriented models. This model provides the rich type system of object-oriented databases, combined with relations as the basis for storage of data. It applies inheritance to relations, not just to types. The object-relational data model provides a smooth migration path from relational databases, which is attractive to relational database vendors.

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  • This chapter describes the process by which queries are executed efficiently by a database system. The chapter starts off with measures of cost, then proceeds to al-gorithms for evaluation of relational algebra operators and expressions.

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  • This chapter is suitable for an advanced course, but can also be used for independent studyprojectsbystudentsofa first course. The chapter covers several aspects of the design of parallel database systems partitioning of data, parallelization of individual relational operations, and parallelization of relational expressions. The chapter also briefly covers some systems issues, such as cache coherency and failure resiliency.

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  • (BQ) Part 1 book "Database system concepts" has contents: Introduction to the relational model, introduction to SQL, advanced SQL, intermediate SQL, formal relational query languages, database design and the E-R Model, indexing and hashing, relational database design, query processing, query optimization,...and other contents.

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  • (BQ) Part 1 book "Fundamentals of database systems" has contents: Introduction to databases, database system concepts and architecture, the relational data model and relational database constraints, conceptual modeling and database design, database programming techniques,...and other contents.

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  • Database System: Chapter 2 - The Relational Data Model & SQL includes about Relational Model Concepts, Relational Model Constraints and Relational Database Schemas, Update Operations and Dealing with Constraint Violations, Basic SQL.

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  • Database System: Chapter 4 - The Relational Algebra and Calculus presents about Relational Algebra (Unary Relational Operations, Relational Algebra Operations From Set Theory, Binary Relational Operations, Additional Relational Operations, Examples of Queries in Relational Algebra); Relational Calculus.

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  • Database System: Chapter 6 - Relational Database Design by ER and EERR-to-Relational Mapping presents about ER-to-Relational Mapping Algorithm, Mapping EER Model Constructs to Relations (Options for Mapping Specialization or Generalization, Mapping of Union Types (Categories).

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  • Database System: Chapter 7 - Functional Dependencies includes Informal Design Guidelines for Relational Databases (Semantics of the Relation Attributes, Redundant Information in Tuples and Update Anomalies, Null Values in Tuples, Spurious Tuples), Functional Dependencies (FDs).

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  • Database System: Chapter 8 - Normalization for Relational Databases includes Normal Forms Based on Primary Keys (Normalization of Relations, Practical Use of Normal Forms, Definitions of Keys and Attributes Participating in Keys,...), General Normal Form Definitions (For Multiple Keys), BCNF (Boyce-Codd Normal Form).

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  • Database System: Chapter 10 - Query Processing and Optimization Introduction to Query Processing, Translating SQL Queries into Relational Algebra, Translating SQL Queries into Relational Algebra, Using Selectivity and Cost Estimates in Query Optimization, Overview of Query Optimization in Oracle.

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