Database Management systems phần 8 pps

... the Internet Databases 661 Commercial database systems and XML: Many relational and object- relational database system vendors are currently looking into support for XML in their database engines. ... these operations). Parallel and Distributed Databases 641 performance database systems, parallelism will be the key. Scheduling in parallel database systems is discussed in [454]....

Ngày tải lên: 08/08/2014, 18:22

... gpa 5 383 1 Madayan madayan@music 11 1 .8 5 383 2 Guldu guldu@music 12 3 .8 53666 Jones jones@cs 18 3.4 53901 Jones jones@toy 18 3.4 53902 Jones jones@physics 18 3.4 53903 Jones jones@english 18 3.4 53904 ... jones@genetics 18 3.4 53905 Jones jones@astro 18 3.4 53906 Jones jones@chem 18 3.4 53902 Jones jones@sanitation 18 3 .8 53 688 Smith smith@ee 19 3.2 53650 Smith smith@math 19...

Ngày tải lên: 08/08/2014, 18:22

... *Giáo dục và đào tạo *Thông tin CHƯƠNG 7 QUẢN TRỊ CHẤT LƯỢNG ĐỒNG BỘ (Total Quality Management – TQM) (Phần 8) 5.2.7 Kiểm tra : Cần xem xét, đánh giá trên những mặt sau : 1 Tình trạng ... việc tiến hành kiểm tra. 5.2 .8 Đảm bảo chất lượng : 7 Xác định công việc của mỗi đơn vị để thỏa man yêu cầu khách hàng trong/ngoài *Phân tích chức năng 8 Giúp nhân viên đạt được qu...

Ngày tải lên: 01/07/2014, 08:39

... Index 351 12 .8 The Impact of Buffering * 352 Contents xxi 28. 3 Mobile Databases 82 5 28. 4 Main Memory Databases 82 5 28. 5 Multimedia Databases 82 6 28. 6 Geographic Information Systems 82 7 28. 7 Temporal ... Sequence Databases 82 8 28. 8 Information Visualization 82 9 28. 9 Summary 82 9 A DATABASE DESIGN CASE STUDY: THE INTERNET SHOP 83 1 A.1 Requirements Analysis 83...

Ngày tải lên: 08/08/2014, 18:22

... 101 10/10/ 98 Dustin 102 10/10/ 98 Dustin 103 10 /8/ 98 Dustin 104 10/7/ 98 Lubber 102 11/10/ 98 Lubber 103 11/6/ 98 Lubber 104 11/12/ 98 Horatio 101 9/5/ 98 Horatio 102 9 /8/ 98 Horatio 103 9 /8/ 98 Figure ... bid day 22 101 10/10/ 98 22 102 10/10/ 98 22 103 10 /8/ 98 22 104 10/7/ 98 31 102 11/10/ 98 31 103 11/6/ 98 31 104 11/12/ 98 64 101 9/5/ 98 64 102 9 /8/ 98 74 103 9...

Ngày tải lên: 08/08/2014, 18:22

... manager toobtainandrelinquishspaceondisk.Thefilemanagementlayerrequestsandfrees disk space in units of a page; the size of a page is a DBMS parameter, and typical values are 4 KB or 8 KB. The file management layer is responsible ... over the block. 2 08 Chapter 7 instructions: “Read block m of track t of cylinder c of disk d.” A database disk space manager could be built using OS files. F...

Ngày tải lên: 08/08/2014, 18:22

... investigated (and compared with sort-based techniques) in [93], [ 187 ], [276], and [ 588 ]. Duplicate elimination was discussed in [86 ]. [2 38] discusses secondary storage access patterns arising in join ... Parallel algorithms for implementing relational operations are discussed in [86 , 141, 185 , 189 , 196, 251, 464]. 384 Chapter 14 conditions c 1 cn at the same time. In the other dire...

Ngày tải lên: 08/08/2014, 18:22

... case than with an index on age, sal. 16.7 OVERVIEW OF DATABASE TUNING After the initial phase of database design, actual use of the database provides a valuable source of detailed information ... hobby) has fewer qualifying tuples. In general, which access path is more Physical Database Design and Tuning 481 16 .8. 5 Horizontal Decomposition Thus far, we have essentially considered...

Ngày tải lên: 08/08/2014, 18:22

... has LSN 80 , and its undoNextLSN field is null because 50 is the only log record for transaction T3. Thus T 3 is completely undone, and an end record is written. Log records 70, 80 , and 85 are written ... algorithm: Write-ahead logging: Any change to a database object is first recorded in the log; the record in the log must be written to stable storage before the change to the database...

Ngày tải lên: 08/08/2014, 18:22

... equal Object -Database Systems 737 We will use acronyms for relational database management systems (RDBMS), object- oriented database management systems (OODBMS), and object-relational database management ... language environment. Object-relational database systems: Object-relational database systems can be thought of as an attempt to extend relational database sy...

Ngày tải lên: 08/08/2014, 18:22