Database Modeling & Design Fourth Edition- P29 potx
Database Modeling & Design Fourth Edition- P29 potx
... R5: DFJ (F->DJ with key F)
R2: AEF (A->EF with key A) R6: DKLMNP (D->KLMNP, L->D,
with keys D, L)
R3: EG (E->G with key E) R7: PQRT (PQR->T with key PQR)
R4: DGI (G->DI with ... Projections
skill_required
emp_id proj_no skill_type
MVDs(nontrivial)
101 3 A proj_no ->> skill_type
101 3 B proj_no ->> emp_id
101 4 A
101 4 C
102 3 A
102 3 B
103 5 D
skill_req1 skil...
Database Modeling & Design Fourth Edition- P50 potx
... by a DBMS.
database life cycle—An enumeration and definition of the basic steps
in the requirements analysis, design, creation, and maintenance
of a database as it evolves over time.
database management ... query.
fourth normal form (4NF)—A table is in fourth normal form (4NF) if
and only if it is at least in BCNF and if whenever there exists a
nontrivial multivalued dependency of...
Database Modeling & Design Fourth Edition- P58 potx
... 109
constraints, 217
UML constructs, 42
QDesigner, 190
Query optimization, 177–78
Rational Data Architect, 188, 189, 211
automatic computing linkages, 198
ER modeling, 193
property editing, 195
XML ... 69
techniques, 69
type conflict, 71
Views, 166
coordinates of, 178
creating, 229
dynamic selection, 176
ER modeling based on
requirements, 61–63
exponential explosion, 167–69
size estimatio...
Database Modeling & Design Fourth Edition- P1 pptx
... Teorey.book Page iv Saturday, July 16, 2005 12:57 PM
Database Modeling & Design Fourth Edition- P2 ppsx
... Database Modeling
& Design:
Logical Design
Fourth Edition
TOBY TEOREY
SAM LIGHTSTONE
TOM NADEAU
AMSTERDAM • BOSTON ... Cerra
Publishing Services Manager Simon Crump
Editorial Assistant Asma Stephan
Cover Design Yvo Riezebos Design
Cover Image Getty Images
Composition Multiscience Press, Inc.
Technical Illustration ... CA 94111
This book is printed on acid-free paper.
© 2006...
Database Modeling & Design Fourth Edition- P3 doc
... available to
help design the most efficient databases. This book is devoted to the
logical design methodologies and tools most popular for relational
databases today. Physical design methodologies ... Tools for Logical Database Design 187
9.1 Introduction to the CASE Tools 188
9.2 Key Capabilities to Watch For 191
9.3 The Basics 192
9.4 Generating a Database from a Design 196
9....
Database Modeling & Design Fourth Edition- P4 ppsx
... the
approach to designing large relational databases by reducing the
Teorey.book Page 6 Saturday, July 16, 2005 12:57 PM
1.2 The Database Life Cycle 3
1.2 The Database Life Cycle
The database life ... requirements
Physical design
Logical design
Implementation
Teorey.book Page 4 Saturday, July 16, 2005 12:57 PM
1.2 The Database Life Cycle 5
b.View integration. Usually, when the d...
Database Modeling & Design Fourth Edition- P5 ppt
... data modeling and database design techniques is impor-
tant for database practitioners and application developers. The database
life cycle shows the steps needed in a methodical approach to designing
a ... data
modeling and logical database design examples throughout this book.
In conceptual data modeling, the overriding emphasis is on simplic-
ity and readability. The goal o...
Database Modeling & Design Fourth Edition- P6 docx
... concepts
that can be applied to the conceptual data modeling phase of the
database life cycle. In Section 2.1, we will look at the simple level of ER
modeling described in the original work by Chen ... all occurrences of that entity depend on an associated
(strong) entity for their existence in the database. For example, in Figure
2.1, the weak entity Employee-job-history is related to...
Database Modeling & Design Fourth Edition- P7 ppsx
... shown here.
(a)
Figure 2.3 Conceptual data modeling notations
ER model constructs
using the
Chen notation
ER model constructs using the
"crow's-foot” approach
[Knowledgeware]
Department
Division ... applied to Department to designate the start date
for that department. Alternatively, it could be applied to Employee as an
attribute for each Employee instance, to designate the em...
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