PHYSICAL DATABASE DESIGN pps

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Tài liệu Physical Database Design for Relational Databases docx

... on Database Systems, Vol. 13, No. 1, March 1933. Physical Database Design for Relational Databases l 93 -the workload on a database changes substantially, -new tables are added, -the database ... accepted July 1987 ACM Transactions on Database Systems, Vol. 13, No. 1, March 1988. Physical Database Design for Relational Databases 97 different physical data managers, which lead to differences ... moreover allows design even when the tables are not yet populated with tuples. ACM Transactions on Database Systems, Vol. 13, No. 1, March 1988 Physical Database Design for Relational Databases *...

Chapter 8 Physical Database Design

... for index, number of database records, and amount of overflow•Storage Efficiency depends on size of index and volatility of database Chapter 08: Physical Database Design Access Numeric ... (excluding cache)•Today: 512MB are common even on PCs•Many databases could fit in memory–New industry trend: Main Memory Database –E.g TimesTen•Main issue is volatility Modifications: ... an overflow block Hashing•Key values of the physical records are not necessarily in logical sequence•Many key values may share the same physical address (block)•May be used for storage...

Beginning Database Design- P2 ppsx

... Database design objectives❑ Database design methodsGrasping the Concept of a Database A database is a collection of information— preferably related information and preferably organized. A database ... of a database model❑ The evolution of database modeling❑ The hierarchical and network database models❑ The relational database model❑ The object and object-relational database models❑ Database ... Microsoft Access database, dBase database, Oracle Database, MySQL, Ingres, or any relational database — it doesn’t matter. All of the coding in this book is writtenintentionally to be non -database specific,...

Beginning Database Design- P4 ppsx

... multiple types of databases, using different database engines, perhaps even including legacy databases, and really any type of database that can be catered for withwhichever database is being ... evolution of database models, how different applica-tions and end-user needs affect database type, the basics of the art of database design, plus varioushuman factors influencing design. Before ... which areessentially database links from one database to another. The link is passed through a specialized driver,which allows the controlling database to talk to another database. Typically,...

Beginning Database Design- P7 pps

... the extremes ofnormalization in a relational database. Extreme reduction in a relational database has the opposite effect to that of an object database whereeverything gets far to complex ... especially in a relational database. After all, a relational structure is not an object structure. Object structures becomemore simplistic as they are further reduced. Object database reduction is ... manage. Extreme forms ofreduction are not of benefit to the relational database model. Additionally, in a relational database themore normalization that is used then the greater the number...

Beginning Database Design- P22 ppsx

... DatabasesA standby database is a failover database. A standby database has minimal activity, usually only addingnew records, changing existing records, and deleting existing records. Some database ... creating software from a design of that software. A physical database is an implementation of a database model.Inactive data — Inactive data is information passed from an OLTP database to a data warehouse, ... elements or parts. In database par-lance, this implies a set of applications and databases, where database engines are different. In otherwords, a company could have a database architecture...

Beginning Database Design- P25 pps

... warehouse database, 196OLTP database, 194read only reporting index, 208read-only environments. See also data warehouse database analysis stage, 223standby databases, 398read-write databases, ... 222defining in model design, 17–19workplace database modeling, 24–25object-relational database modeldescribed, 414functional categories, 14history, 7object model and, 165ODQL (Object Database Query ... 205messed-up database, sorting out, 34metadatachanging, 145–146 database structure change commands, 127described, 4, 413slots, saving in 1NF, 86tables fields expressing, 38method database model design, ...

Database Design and Implementation with SQL Server 2000

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Module 6: Deriving a Physical Data Design

... theLogical Data Design ImplementingRelationshipsData OptimizationTechniquesActivity 6.2: Optimizing a Physical Data Design Module 6: Deriving a Physical Data Design Module 6: Deriving a Physical ... processing. 120 Module 6: Deriving a Physical Data Design !!!! Physical Data Design "Describing a Physical Data Model"Identifying Database Tables and Fields"Common ... In this activity, you will derive a physical data design from a logical data design. Module 6: Deriving a Physical Data Design 121 Describing a Physical Data Model "Flat-file$ISAM"Hierarchical$Microsoft...

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