Database Design Using Entity-Relationship Diagrams phần 2 pps

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Ngày tải lên: 13/08/2014, 12:21

... front. What really happens is that Spreadsheet 2 comes to the front, as shown in Figure 2- 2, a frustrating surprise for almost anybody. 12 Figure 3-5: Half the screen is grey. This is ... offered so that they can make an educated decision.) It has been said that design is the art of making choices. When you design a trash can for the corner, you have to make choices betwe...

Ngày tải lên: 14/08/2014, 00:21

... 43,989 928 –9 82 98 82 Ford 44,000 28 3–9 72 0 927 Raja 38,988 OWNER so_ssn so_name so_off_phone so_address 879–987– 0987 Earp (850)474 20 93 1195 Gulf Breeze Pkwy, Pensacola, FL 826 –098– 0877 ... Men's clothing . 2 Men's clothing 2 Women's clothing 2 Children's clothing 2 Hardware . . . STORE MANAGER sm_ssn sm_name sm_salary 23 4–987–098...

Ngày tải lên: 13/08/2014, 12:21

... c_number student_number COP4710 589 CGS3464 589 CGS3464 909 STA3 023 589 HIST2 022 384 STA3 023 505 STA3 023 876 HIST2 022 876 HIST2 022 505 Tighter English We strongly recommend that an English ... Compact Red 1989 909 E98 722 Mazda Van Green 20 02 876 F77665 Ford Compact White 1998 384 STUDENT name.first name.last name.mi student_number address Richard Earp W 589 22 2 2n...

Ngày tải lên: 13/08/2014, 12:21

... Florida Mall 9 82- 876- 8766 928 -9 82- 98 82 STORE MANAGER sm_ssn sm_name sm_salary 23 4-987-0988 Saha 45,900 456-098-0987 Becker 43,989 928 -9 82- 98 82 Ford 44,000 28 3-9 72- 0 927 Raja 38,988 name ... essn dnum snum Kaitlyn 987–754–9865 501 1 Fred 27 6 26 3–91 827 5 02 1 Katie 9 82 928 27 26 503 1 Seema 837–937–9373 501 1 Raju 988–876–3434 601 2 . . . nam...

Ngày tải lên: 13/08/2014, 12:21

... Fry, J.P., "A Logical Design Methodology for Relational Databases Using the Extended Entity-Relationship Model," ACM Computing Surveys , 18 (2) , 197 22 2, June 1986.

Ngày tải lên: 13/08/2014, 12:21

... EMPLOYEE essn dnum snum dm_ssn 987-754-9865 501 1 27 6 -26 3-91 82 27 6 -26 3-91 82 5 02 1 null 9 82- 928 -27 26 503 1 987-754-9865 STORE MANAGER sm_ssn salary 23 4-987-0988 45,900 456-098-0987 43,989 Chapter ... ranking national ranking 322 -00- 123 4 23 140 876-09-9873 47 26 0 GOLF ss# handicap 23 9- 92- 0983 3 873-97-9877 1 FOOTBALL ss# position 398-08-0 928 tackl...

Ngày tải lên: 13/08/2014, 12:21

... students in database classes and to help database practitioners in understanding how to arrive at a definite, clear database design using an entity relationship (ER) diagram. In designing a database ... supplemental text in database courses, systems analysis and design courses, and other courses that design and implement databases. Many present-day database and systems a...

Ngày tải lên: 13/08/2014, 12:21

... snum dm_ssn Kaitlyn 987–754–9865 501 1 27 6 26 3–91 82 Fred 27 6 26 3–91 82 5 02 1 null Katie 9 82 928 27 26 503 1 987–754–9865 Seema 837–937–9373 501 1 27 6 26 3–91 82 . . . Figure 6.D: Instances ... Entity Relationship (ER) Diagrams, " Data Base Management , Auerbach Publications, Boca Raton, FL, 22 -10-43, 1–17, April 20 00. Hawryszkiewycz, I., Databas...

Ngày tải lên: 13/08/2014, 12:21

... 22 0 -22 1 mapping of M:N relationships, 22 8 -22 9 multi-valued attributes, 22 6 problem with, 22 0 recursive relationships, 22 7 -22 8 relationships, 22 2 -22 3 structural constraints, 22 3 -22 4 ... rule, 12 Degree of relationship, 55 , 23 3 Derived attribute, 28 -30, 33, 23 3 Derived relationship, 150 Index B Barker/Oracle-like model, 28 , 21 9 -23 1 attri...

Ngày tải lên: 13/08/2014, 12:21