Tài liệu Database Systems - Part 15 docx

... 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 J...

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 ... generate fewer relation schemas than algorithm 3NF.1.  COP 4710: Database Systems (Day 12) Page 15 Mark Llewellyn • The algorithm given on pag...

Ngày tải lên: 21/01/2014, 18:20

... . . 154 Find Text in a Workbook . . . . . . . . . . . . . . . . . . . . . . . 156 Replace Text in a Workbook . . . . . . . . . . . . . . . . . . . . . 158 10_577639-ch08.indd 14710_577639-ch08.indd ... change to the blank workbook before opening any existing file. 10_577639-ch08.indd 14910_577639-ch08.indd 149 3 /15/ 10 2:45 PM3 /15/ 10 2:45 PM 141 Manipulating Excel Worksheets CHAPTER...

Ngày tải lên: 14/12/2013, 15:15

... 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

... 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

... 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 ... ) -) % COP 4710: Database Systems (Day 10) Page 15 Mark Llewellyn • A relation scheme R is in 2NF with respect to a set of fun...

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 ... 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...

Ngày tải lên: 21/01/2014, 18:20

... 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 4710: Database Systems Spring 2004 Introduction ... REFERENCES VENDOR ON UPDATE CASCADE); COP 4710: Database Systems (Day 17) Page 15 Mark Llewellyn The PRODUCT Table in Access (-) COP 4710: Database Sy...

Ngày tải lên: 21/01/2014, 18:20

... 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6...

Ngày tải lên: 21/01/2014, 18:20