Database Design Using Entity-Relationship Diagrams phần 5 ppsx

... relational database. Exercise 5. 3 How are weak entities generally identified? Exercise 5. 4 What mapping rules would be used to map Figure 5. 4? Map Figure 5. 4 to a relational database and ... Chapter 6. EMPLOYEE ename essn dnum snum Kaitlyn 987– 754 –98 65 501 1 Fred 276–263–91827 50 2 1 Katie 982–928–2726 50 3 1 Seema 837–937–9373 50 1 1 Raju 988–876–3434 601 2 ....

Ngày tải lên: 13/08/2014, 12:21

... n 30t G J · n 9 ,55 t M rot G 12 · 1800 9 ,55 · t G 2261,8 t 5. M lin CM rot G 4079,7 t C 2261,8 t G 6341 ,5 t G1 ,55 · M lin The influence of the rotating masses is in this case 55 percent of the ... m͞sec 15. The effective brake moment is: M be G η b · M b (Nm) M be G0, 95 · 19 000 G18 050 Nm 16. The effective braking time is: t brake G ω 3 · J total M be CM 1 (sec) t br G 36 · 63 ,55...

Ngày tải lên: 08/08/2014, 12:23

... [2001] describes a database designed for XML. XML support in commercial databases is described in Banerjee et al. [2000], Cheng and Xu [2000] and Rys [2001]. See Chapters 25 through 27 for more ... without writing application code, where possible. Database vendors are therefore working to XML-enable their database products. An XML-enabled database supports an automatic mapping from i...

Ngày tải lên: 08/08/2014, 18:22

... access to all of the database objects 55 6 Part IV: PL/SQL ORACLE Series TIGHT / Oracle Database 10g: TCR / Loney / 2 253 51-7 / Chapter 31 Blind Folio 31 :55 6 P:\010Comp\Oracle8\ 351 -7\CD\Ventura\book.vp Friday, ... Triggers 54 5 ORACLE Series TIGHT / Oracle Database 10g: TCR / Loney / 2 253 51-7 / Chapter 30 Blind Folio 30 :54 5 P:\010Comp\Oracle8\ 351 -7\CD\Ventura\book.vp Friday...

Ngày tải lên: 08/08/2014, 20:21

... This is a principle called design for extremes. Don't design something that can only be read in daylight: design it to be read in dim light, too. Don't design something that can only ... while. When you're designing for extremes with software, the three most important "extremes" to remember are: 1. Design for people who can't read. 2. Design for...

Ngày tải lên: 14/08/2014, 00:21

... the designed database to a naive user, and (2) checking the meaning on the designed database among the designers. The complete version of the English may eventually prove tiresome to a database ... student_number COP4710 58 9 CGS3464 58 9 CGS3464 909 STA3023 58 9 HIST2022 384 STA3023 50 5 STA3023 876 HIST2022 876 HIST2022 50 5 Tighter English We strongly recommend that...

Ngày tải lên: 13/08/2014, 12:21

... TAG1 F1 PENS $83.98 TAG2 G 25 MOB $ 95. 25 TAG3 G20 DEL $99.10 TAG4 F4 GULF PRODUCT productID … TAG1 TAG2 TAG3 … SUPPLIER supplierID … F1 G 25 G20 … CUSTOMER ... student student # other sport info Baker 123 456 789 … tennis 220, state rank 14 Adams 123 456 788 … football tackle, neck brace Jones 123 455 676 … golf handicap 3 Figure 7.8:...

Ngày tải lên: 13/08/2014, 12:21

... essn dnum snum dm_ssn 987- 754 -98 65 501 1 276-263-9182 276-263-9182 50 2 1 null 982-928-2726 50 3 1 987- 754 -98 65 STORE MANAGER sm_ssn salary 234-987-0988 45, 900 456 -098-0987 43,989 Chapter ... SS# sport 140 Kumar M 5. 95 239-92-0983 golf 200 Kelvin M 6.02 398-08-0928 football 1 35 Sarah F 5. 6 322-00-1234 tennis 1 65 Arjun M 6.01 873-97-9877 golf 1 45 Deesha F...

Ngày tải lên: 13/08/2014, 12:21