Database Management systems phần 5 docx

... 12 13 140 2 31 56 789410 11 12 13 140 2 31 56 7894 10 11 12 13 140 2 31 56 7894 10 11 12 13 140 2 31 56 7894 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 ... Bucket 5Bucket 1 Bucket 2 Bucket 3 Bucket 4 Bucket 5 Count=8 Count=4 Count= 15 Count=3 Count= 15 Bucket 1Bucket 1 Count=9 Bucket 4 Count=7 Bucket 3 Count=10 Bucket 2 Cou...

Ngày tải lên: 08/08/2014, 18:22

... 5. Database management systems - 5. Relational databases and SQL basics – page 1 Information Management Resource Kit Module on Management of Electronic Documents UNIT 5. DATABASE MANAGEMENT SYSTEMS LESSON ... answers 5. Database management systems - 5. Relational databases and SQL basics – page 15 Summary • SQL (Structured Query Language) is the language used to in...

Ngày tải lên: 31/03/2014, 20:20

... of Synthesized Speech over the Phone 2 15 part 5. 1, and between 23 and 29 years (mean 25. 2 years) for part 5. 2. The subjects were paid for their service. 5. 4.2 Results For correctly interpreting ... conditions. 23 test subjects (13 male, 10 female) participated in part 5. 1, and 6 subjects (4 male, 2 female) in part 5. 2. 12 of them (5 in part 5. 2) reported to have no experience...

Ngày tải lên: 07/08/2014, 21:20

... ISA Hierarchies 7 15 24.3.4 Generalized Association Rules 716 24.3 .5 Sequential Patterns 717 viii Database Management Systems 2 .5 Conceptual Database Design With the ER Model 38 2 .5. 1 Entity versus ... Difference 350 12.7 Aggregate Operations * 350 12.7.1 Implementing Aggregation by Using an Index 351 12.8 The Impact of Buffering * 352 Contents xxi 28.3 Mobile Databases 8 25...

Ngày tải lên: 08/08/2014, 18:22

... 45. 0 29 Brutus 1 33.0 31 Lubber 8 55 .5 32 Andy 8 25. 5 58 Rusty 10 35. 0 64 Horatio 7 35. 0 71 Zorba 10 16.0 74 Horatio 9 35. 0 85 Art 3 25. 5 95 Bob 3 63 .5 Figure 4. 15 An Instance S3 of Sailors sid ... rating age 22 Dustin 7 45. 0 31 Lubber 8 55 .5 58 Rusty 10 35. 0 Figure 4.1 Instance S1 of Sailors sid sname rating age 28 yuppy 9 35. 0 31 Lubber 8 55 .5 44 guppy 5 35. 0...

Ngày tải lên: 08/08/2014, 18:22

... (Section 5. 4) SQL supports the aggregate operators COUNT, SUM, AVERAGE, MAX,andMIN. (Sec- tion 5. 5) Grouping in SQL extends the basic query form by the GROUP BY and HAVING clauses. (Section 5. 5.1) A ... age 22 dustin 7 45. 0 58 rusty 10 35. 0 44 horatio 7 35. 0 Figure 6.1 An Instance of Sailors query prints the value 38.3: Sailors sid sname rating age A P.AVG. A Thus, the value 35. 0 i...

Ngày tải lên: 08/08/2014, 18:22

... 3.4 53 9 05 Jones jones@astro 18 3.4 53 906 Jones jones@chem 18 3.4 53 902 Jones jones@sanitation 18 3.8 53 688 Smith smith@ee 19 3.2 53 650 Smith smith@math 19 3.8 54 001 Smith smith@ee 19 3 .5 540 05 Smith ... problem. 274 Chapter 9 10 20 30 80 35 42 50 65 90 98 ABC 30* 31* 36* 38* 42* 43* 51 * 52 * 56 * 60* 68* 69* 70* 79* 81* 82* 94* 95* 96* 97* 98* 99* 1 05* L1 L2 L3 L4...

Ngày tải lên: 08/08/2014, 18:22

... {(a,2,3,4 ,5) , (2,a,3 ,5, 5)} (c) {(a,2,3,4 ,5) , (2,a,3 ,5, 5), (a,2,3,4,6)} (d) {(a,2,3,4 ,5) , (2,a,3,4 ,5) , (a,2,3,6 ,5) } (e) {(a,2,3,4 ,5) , (2,a,3,7 ,5) , (a,2,3,4,6)} (f) {(a,2,3,4 ,5) , (2,a,3,4 ,5) , (a,2,3,6 ,5) , ... dependency theory and its use in database design include [3, 38, 436, 443, 656 ]. Good survey articles on the topic include [663, 355 ]. FDs were introduced in [...

Ngày tải lên: 08/08/2014, 18:22

... 05 CLR: Undo T1 LSN 10, T1 end T1 abort 40, 45 CLR: Undo T3 LSN 50 , T3 end CLR: Undo T2 LSN 20, T2 end undonextLSN prevLSN 80, 85 90, 95 Figure 20 .5 Example of Undo with Repeated Crashes The ... a checkpoint record. Concurrency Control 55 3 3* 4* 6* 9* 10* 11* 12* 13* 20*22* 23* 31* 35* 36* 38*41* 44* 20 44 38 12 623 35 10 DE C B A F GH I Figure 19 .5 B+ Tree Locking Example E...

Ngày tải lên: 08/08/2014, 18:22

... distributed systems. [82] contains several articles on these topics. Multidatabase systems are discussed in [7, 96, 193, 194, 2 05, 412, 420, 451 , 452 , 52 2, 55 8, 672, 697]; see [ 95, 421, 59 5] for surveys. Internet ... processing in parallel database systems. Textbook discussions of distributed databases include [ 65, 123, 50 5]. Good survey articles in- clude [72], which focu...

Ngày tải lên: 08/08/2014, 18:22