Applied Mathematics for Database Professionals phần 5 pps
Applied Mathematics for Database Professionals phần 5 pps
... )
PTIJ10(EMP,REG,OFFR,CRS) :=
CHAPTER 7 ■ SPECIFYING DATABASE DESIGNS 1 75
7 451 CH07.qxd 5/ 15/ 07 9:43 AM Page 1 75
Set function DBCHR is called a database characterization. It characterizes a database in that
it introduces ... 7 ■ SPECIFYING DATABASE DESIGNS 152
7 451 CH07.qxd 5/ 15/ 07 9:43 AM Page 152
We’ll often specify the database constraints in a slightly different ma...
Applied Mathematics for Database Professionals phần 1 pot
... Telegraph Avenue, Suite 600,
Berkeley, CA 947 05. Phone 51 0 -54 9 -59 30, fax 51 0 -54 9 -59 39, e-mail
info@apress.com, or visit
http://www.apress.com.
The information in this book is distributed on an ... copyright owner and the publisher.
ISBN-13: 978-1 -59 059 -7 45- 3
ISBN-10: 1 -59 059 -7 45- 1
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
Trademarked names...
Applied Mathematics for Database Professionals phần 2 ppt
... single element
from a singleton set. In this book we use the symbol
↵ for this operator; for example:
↵ {5} = 5
↵{ {5, 6}} = {5, 6}
For singleton sets, you could consider the choose operator as an “unbracer,” ... and set B the same for y. The gen-
eral syntax for expressions using quantification is shown in Listing 3-12.
CHAPTER 3 ■ SOME MORE LOGIC 51
7 451 CH03.qxd 5/ 4/07 2:...
Applied Mathematics for Database Professionals phần 3 docx
... 99
#varchar(10) = 52
10
+ 52
9
+ 52
8
+ + 52
1
= 751 68 655 09 350 9 652 46
#date = 3442447
#{'CLERK','SALESMAN','TRAINER','MANAGER','PRESIDENT'} = 5
#[1000 ... a
structured way (that is, conforming to the database design). Abstractly, a
database is the cur-
rent value of the
database variable; it is the informal term for da...
Applied Mathematics for Database Professionals phần 4 docx
... such tables. Defin-
ition 5- 4 for
mally defines this operator.
CHAPTER 5 ■ TABLES AND DATABASE STATES 107
7 451 CH 05. qxd 5/ 4/07 3 :57 PM Page 107
7 451 CH 05. qxd 5/ 4/07 3 :57 PM Page 116
Shorthand Notation
Writing ... and
one for departments. Take a look at tables
EMP1 and DEP1, which are displayed in Figures 5- 2
and 5- 3.
CHAPTER 5 ■ TABLES AND DATABASE STATES98
7 45...
Applied Mathematics for Database Professionals phần 6 pptx
... y
ou see ho
w to
change
PTIJ 15?
CHAPTER 7 ■ SPECIFYING DATABASE DESIGNS184
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7 451 CH08.qxd 5/ 7/07 11:22 AM Page 198
Listing 8 -5 shows a set-theory way to specify ... set of database states called the
database universe.
It holds the admissible database states for the database being specified. You can con-
struct a database universe...
Applied Mathematics for Database Professionals phần 7 pot
... excellent performance given
the optimizer technology available in Oracle’s current SQL DBMS.
CHAPTER 11 ■ IMPLEMENTING DATABASE DESIGNS IN ORACLE 255
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■Note If ... IMPLEMENTING DATABASE DESIGNS IN ORACLE 253
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■Note If you’re familiar with Oracle, you’ll know that Oracle’s SQL DBMS can perform this serv...
Applied Mathematics for Database Professionals phần 8 doc
... Here is the formal specification of this table constraint:
CHAPTER 11 ■ IMPLEMENTING DATABASE DESIGNS IN ORACLE268
7 451 CH11.qxd 5/ 15/ 07 2:26 PM Page 268
Listing 11- 25. Tuple Constraints for GRD Table ...
D r
epr
esents a department table).
CHAPTER 11 ■ IMPLEMENTING DATABASE DESIGNS IN ORACLE 2 65
7 451 CH11.qxd 5/ 15/ 07 2:26 PM Page 2 65
where not exists(select m.DEPTNO
from...
Applied Mathematics for Database Professionals phần 9 pdf
... ■ FORMAL DEFINITION OF EXAMPLE DATABASE 3 25
7 451 AppA.qxd 5/ 15/ 07 9: 45 AM Page 3 25
Database Skeleton DB_S
I
n this section, you’ll find a specification of the skeleton
D
B_S
f
or the sample database.
A ... ■ FORMAL DEFINITION OF EXAMPLE DATABASE3 14
7 451 AppA.qxd 5/ 15/ 07 9: 45 AM Page 314
Formal Definition of Example
Database
In this appendix, we deliver the formal sp...
Applied Mathematics for Database Professionals phần 10 doc
... rules, 10
predicates, 5, 51 58 , 59 , 3 05
compound, 9, 53 , 60
data integrity, 117–138
external, 79
instantiating, 7
nesting quantifiers and, 55
normal forms and, 59 –63
simple, 9, 59 , 61
special categories ... empty sets, 54
syntax for, 51
quantifiers, 8, 51 59
distributiv
e properties of, 57
negation of, 57
nesting, 55
queries, 199–220, 306
business logic code and, 2...
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