Tài liệu Database Systems - Part 14 pdf

... joins later. COP 4710: Database Systems (Day 18) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to SQL – Part 2 BÀI 14, 2 ngày COP 4710: Database Systems Spring 2004 Introduction ... Operator 5.62965 2965 0 A 67# .621 01.00 02< 886 0.86 02612@ 0...

Ngày tải lên: 21/01/2014, 18:20

... 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 ... well-designed database produces, in an efficient way, a system that provides the correct information for the decision-making process to succeed. Database Design (cont.) COP 4710: Database Sys...

Ngày tải lên: 24/12/2013, 12:16

... (‘23 11 4- AA’, ‘Sledge hammer, 12 lb.’, NULL, NULL, NULL, NULL, NULL, NULL); -or- INSERT INTO PRODUCT(P_CODE, P_DESCRIPT) VALUES(‘23 11 4- AA’, ‘Sledge hammer, 12 lb.’); COP 4710: Database Systems ... lb.’, ’02-Jan-02’, 8, 5, 14. 40, 0.05, NULL); This code inserts this row into PRODUCT COP 4710: Database Systems (Day 17) Page 2 Mark Llewellyn History of SQL • SQL, pronounced “S-Q...

Ngày tải lên: 21/01/2014, 18:20

... 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 ... have. Emp-Phone(emp-name, telephone-number, age, location, manufacturer, serial-num) Entity Sets vs. Attributes COP 4710: Database Systems (Day 4) Page 1 Mark Llewellyn COP 4710: Database Systems Spring...

Ngày tải lên: 24/12/2013, 12:16

... 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-street customer-city E-R ... 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 Spr...

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 ... detail. Temporal relational databases and certain categories of spatial databases fall into the N1NF category. )) ),)% COP 4710: Datab...

Ngày tải lên: 21/01/2014, 18:20

... (cont.) COP 4710: Database Systems (Day 11) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Normalization – Part 2 BÀI 11, 1 ngày COP 4710: Database Systems Spring ... dependencies are preserved. Preservation of the Functional Dependencies (cont.) COP 4710: Database Systems (Day 11) Page 14 Mark Llewellyn Algorithm for Testing the Preservat...

Ngày tải lên: 21/01/2014, 18:20

... $ }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 3 BÀI 12, 1/2 ngày COP 4710: Database Systems Spring ... schemas than algorithm 3NF.1.  COP 4710: Database Systems (Day 12) Page 15 Mark Llewellyn • The algorithm given on page 14 of Day 11 notes for...

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 Jo...

Ngày tải lên: 21/01/2014, 18:20

... -5 Unch -3 -3 -1 0 1994 +14 -3 1 Unch -9 Unch -1 6 1995 +30 -5 8 +7 -5 +8 -8 1996 -6 8 +43 -1 3 +4 -1 3 +6 1997 -5 5 ... -1 3 +6 1997 -5 5 +40 -6 +3 -1 2 +7 1998 -2 9 +18 -2 Unch -9 Unch 1999 -2 9 -3 4...

Ngày tải lên: 10/12/2013, 10:15