TAILIEUCHUNG - Database Systems - Part 15

A query expresses in a high-level language like SQL must first be scanned, parsed, and validated. • Once the above steps are completed, an internal representation of the query is created. Typically this is either a tree or graph structure, called a query tree or query graph. • Using the query tree or query graph the RDBMS must devise an execution strategy for retrieving the results from the internal files. • For all but the most simple queries, several different execution strategies are possible. The process of choosing a suitable execution strategy is called query optimization | COP 4710: Database Systems Spring 2004 Query Processing and Optimization BÀI 15, 1,5 ngày School of Electrical Engineering and Computer Science University of Central Florida Instructor : Mark Llewellyn markl@ CC1 211, 823-2790 Phd, MS, Under Query Processing and Optimization A query expresses in a high-level language like SQL must first be scanned, parsed, and validated. Once the above steps are completed, an internal representation of the query is created. Typically this is either a tree or graph structure, called a query tree or query graph. Using the query tree or query graph the RDBMS must devise an execution strategy for retrieving the results from the internal files. For all but the most simple queries, several different execution strategies are possible. The process of choosing a suitable execution strategy is called query optimization. The Steps in Query Processing Scanning, Parsing, and Validation query in a high-level .

• Cơ sở dữ liệu
• Database Systems
• hệ thống
• cơ sở dữ liệu
• quản lý
• Chế biến
• tối ưu hoá truy vấn
• Lecture Database Systems
• Database systems concepts
• Database systems architecture
• Database languages
• Data management systems framework
• Introduction to Database Systems
• Database system concepts
• Entity Relationship model
• Database security
• Distributed database systems
• Principles of distributed database systems
• Cơ sở dữ liệu phân tán
• Parallel database systems
• Load balancing
• Database architecture
• Database approach
• Database management systems
• Lecture Database management systems
• File based system
• Characteristics of the database
• Data dictionary
• Database integration
• Schema matching
• Fundamentals of database systems
• The relational data model
• Database design
• Database programming techniques
• Relational database constraints
• Database System
• Relational databases
• Relational database design algorithms
• Relational database systems
• Computer networks
• Practical Database Design
• Physical Database Design in Relational Databases
• An Overview of Database Tuning in Relational Systems
• Physical Database Design Decisions
• Data models
• Hierarchical model
• Designing a set of relations
• Relational decompositions
• Relational database schema
• Database users
• Database applications
• Typical DBMS functionality
• Databases and database users
• Relational calculus
• Physical database design
• Concurrency control techniques
• Database recovery techniques
• Distributed databases
• Multivalued dependencies
• Fundamentals of database management systems
• Logical database design
• Object oriented database management
• Data administration
• Design problem
• Dimensions of the problem
• Database development
• Database environments
• Object database management systems
• Object database
• Bài giảng Hệ quản trị cơ sở dữ liệu
• Operating systems
• Attribute alias
• Lecture Database system concepts
• Database system architectures
• Relational database design