Database Management systems phần 10 pdf

... Obermarck. Transaction management in the R* dis- tributed database management system. ACM Transactions on Database Systems, 11(4):378–396, 1986. 864 Database Management Systems [387] H. Korth, ... Transactions on Database Systems, 15(2):162–207, 1990. 872 Database Management Systems [567] R. E. Sanders. ODBC 3.5 Developer’s Guide. McGraw-Hill Series on Data Warehousin...

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 ... general, physical database design. How do you see Designview being used, if at all, in the context of physical database design? BIBLIOGRAPHIC NOTES [572] is an early discussion of physica...

Ngày tải lên: 08/08/2014, 18:22

... A Dynamic Index Structure 10. 3.1 Format of a Node 10. 4 Search 10. 5 Insert 10. 6 Delete 10. 7 Duplicates 10. 8 B+ Trees in Practice 10. 8.1 Key Compression 10. 8.2 Bulk-Loading a B+ Tl'ee 10. 8.3 The Order Concept 10. 8.4 The Effect ... several commercial systems based on this model. [721] contains a good annotated collection of systems- oriented papers on database mana...

Ngày tải lên: 29/03/2014, 12:20

... several commercial systems based on this model. [634] contains a good annotated collection of systems- oriented papers on database management. Other texts covering database management systems include ... book covers the fundamentals of modern database management systems, in particular relational database systems. It is intended as a text for an introductory database co...

Ngày tải lên: 08/08/2014, 18:22

... day Dustin 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 ... 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 9/8/98 Figure 4.16 An Instance R2 of Reserves bid bname color...

Ngày tải lên: 08/08/2014, 18:22

... we could say < 10 to retrieve sailors with a rating less than 10 or say 10 to retrieve sailors whose rating is not equal to 10. The expression 10 in an attribute column is thesameas= 10. As we ... rating age P. 10 Placing a constant, say 10, in a column is the same as placing the condition =10. This query is very similar in form to the equivalent DRC query {I,N ,10, A|I,N ,1...

Ngày tải lên: 08/08/2014, 18:22

... B=129 B=257 100 7 4 3 2 1 1 1,000 10 5 4 3 2 2 10, 000 13 7 5 4 2 2 100 ,000 17 9 6 5 3 3 1,000,000 20 10 7 5 3 3 10, 000,000 23 12 8 6 4 3 100 ,000,000 26 14 9 7 4 4 1,000,000,000 30 15 10 8 5 4 Figure ... is shown in Figure 10. 9. 10 h h 00 01 10 11 000 001 010 011 00 100 Next=1 PRIMARY PAGES OVERFLOW PAGES Level=0 32* 9* 5* 25* 14* 18* 10* 30* 31* 35* 7* 11* 44* 36* 4...

Ngày tải lên: 08/08/2014, 18:22

... histograms, called equiwidth and equidepth, respectively. 10 11 12 13 140 2 31 56789 410 11 12 13 140 2 31 567894 10 11 12 13 140 2 31 567894 10 11 12 13 140 2 31 567894 Equidepth 2.67 1.33 5.0 1.0 5.0 2.67 1.33 5.0 1.0 5.0 2.67 1.33 5.0 1.0 5.0 Equiwidth Bucket ... result should be uniformly ignored. Relation R contains 10, 000 tuples and has 10 tuples per page. Relation S contains...

Ngày tải lên: 08/08/2014, 18:22

... CHAR (10) , rating INTEGER, age REAL, assigned INTEGER NOT NULL, PRIMARY KEY (sid), FOREIGN KEY (assigned) REFERENCES Boats (bid)) CREATE TABLE Boats ( bid INTEGER, bname CHAR (10) , color CHAR (10) , captain ... Consider a database that is organized in terms of the following hierarachy of objects: The database itself is an object (D), and it contains two files (F 1andF2), each of which co...

Ngày tải lên: 08/08/2014, 18:22

... 6. Internet Databases 665 Rid Document Signature 1 agent James Bond 1100 2 agent mobile computer 1101 3 James Madison movie 101 1 4 James Bond movie 1 110 Word Inverted list Hash agent 1, 2 100 0 Bond ... 2 100 0 Bond 1, 4 0100 computer 2 0100 James 1, 3, 4 100 0 Madison 3 0001 mobile 2 0001 movie 3, 4 0 010 Figure 22.9 A Text Database with Four Records and Indexes...

Ngày tải lên: 08/08/2014, 18:22