Tài liệu Database Systems - Part 5 pptx

... COP 4710: Database Systems (Day 5) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Data Modeling – Part 2 BÀI 5, 1 ngày COP 4710: Database Systems Spring 2004 Introduction ... Database Systems (Day 5) Page 29 Mark Llewellyn Correspondence of E-R & UML Class Diagrams Entity sets and attributes customer customer-name customer-id customer-...

Ngày tải lên: 24/12/2013, 12:16

... Example ERD customer customer-id customer-name street apartment-num phone-num date-of-birth age first-name middle-name last-name address city state zipcode street-name street-num ... Strong Entity Sets (cont.) loan loan-num amount loan- payment payment payment-num payment-date amount COP 4710: Database Systems (Day 4) Page 15 Mark Llewellyn E-R Model Notation E entity set E weak ......

Ngày tải lên: 24/12/2013, 12:16

... COP 4710: Database Systems (Day 3) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Database Systems – Part 2 BÀI 2, 1/2 ngày School of Electrical ... Level COP 4710: Database Systems (Day 3) Page 15 Mark Llewellyn • The overall description of the database is called the database schema. • There are three different types of schema in the...

Ngày tải lên: 24/12/2013, 12:16

... G} ) -) % COP 4710: Database Systems (Day 10) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Normalization BÀI 10, ½ ngày COP 4710: Database Systems Spring ... non-prime attribute which is partially dependent on any key of R. In other words, no non-prime attribute is dependent on only a portion of the key of R. ...

Ngày tải lên: 21/01/2014, 18:20

... Lossless Join - Example A B C D E (AD) a 1 b 12 b 13 a 4 b 15 (AB) a 1 a 2 b 23 b 24 b 25 (BE) b 31 a 2 b 33 b 34 a 5 (CDE) b 41 b 42 a 3 a 4 a 5 (AE) a 1 b 52 b 53 b 54 a 5 COP 4710: Database Systems ... D E (AD) a 1 b 12 b 13 a 4 b 15 (AB) a 1 a 2 b 13 b 24 b 25 (BE) b 31 a 2 b 33 b 34 a 5 (CDE) b 41 b 42 a 3 a 4 a 5 (AE) a 1 b 52 b 13 b 54 a 5 COP 4710...

Ngày tải lên: 21/01/2014, 18:20

... A F&G 56 8H 9E $ }A,B,C,D{D G = + COP 4710: Database Systems (Day 12) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Normalization – Part ... time: equates a 5 , b 15 , b 25 ) Decomposition has the lossless join property. ;<=%>?  A B C D E (...

Ngày tải lên: 21/01/2014, 18:20

... VALUES (212 25, ‘Bryson, Inc.’, ‘Smithson’, ‘6 15 , ‘22 3-3 234’, ‘TN’, ‘Y’); INSERT INTO VENDOR VALUES (21226, ‘SuperLoo, Inc.’, ‘Flushing’, ‘904’, ‘21 5- 8 9 95 , ‘FL’, ‘N’); COP 4710: Database Systems ... today’s date COP 4710: Database Systems (Day 17) Page 19 Mark Llewellyn The INVOICE Table in Access (-) COP 4710: Database Systems (Day 17) Page 1 Mark Llewellyn COP 47...

Ngày tải lên: 21/01/2014, 18:20

... 5  @022 02688 0 65   67 COP 4710: Database Systems (Day 18) Page 23 Mark Llewellyn Right Outer Joins (cont.) (+) 5  ;56 2.6:20 52  2 65 16 5 0; 2# COP ... (cont.) 5 .629 65  29 65  0 A 67# .621 01.00 02< 88072 65 2;067 0 65...

Ngày tải lên: 21/01/2014, 18:20

... conjunction. COP 4710: Database Systems (Day 21) Page 1 Mark Llewellyn © COP 4710: Database Systems Spring 2004 Query Processing and Optimization BÀI 15, 1 ,5 ngày COP 4710: Database Systems Spring 2004 Query ... equi-join operation R * A=B S has the same effect as a natural join operation. COP 4710: Database Systems (Day 21) Page 22 Mark Llewellyn © Algorithms for Two-way...

Ngày tải lên: 21/01/2014, 18:20

... SQL Tutorials - Phần I (bài 4) Câu lệnh INSERT INTO : Như đã nói ở trên câu lệnh INSERT INTO dùng để thêm ... INTO table_name VALUES (value1, value2, ) Hoặc cũng có thể chỉ rõ cột mà mình muốn insert dữ liệu : Trích: INSERT INTO table_name (column1, column2, ) VALUES (value1, value2, ) Insert

Ngày tải lên: 26/01/2014, 13:20