LCKn
RECO
PMON
SMON
CKPT
ARCH
DBWR
LGWR
Legend:
D000
Shared
server
process
PMON
SMON
CKPT
LGWR
Redo Log
files
ARCH
Redo Log
Buffer
Database
files
DBWR
User
Process
Dedicated
server
process
Database
Buffer Cache
System Global Area (SGA)
RECO
Lock process
Recoverer process
Process monitor
System monitor
Checkpoint
Archiver
Database writer
Log writer
User Processes
User
Process
LCKn
Control
files
Offline
storage
device
Figure 10.1
An Oracle instance.
(From Oracle (1997a).) Copyright © Oracle Corporation, 1997. All rights reserved.
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.2
Data blocks, extents, and segments in Oracle.
(From Oracle (1997a).) Copyright © Oracle Corporation, 1997. All rights reserved.
Segment
112Kb
Kb
Kb
Kb
Extent
28Kb
Extent
84Kb
Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
2Kb
Data Blocks
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.3 Defining the EMPLOYEE relation
using the Access user interface.
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.4 Establishing referential integrity
between DNUMBER and DNO.
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.5
Relationships Window for the COMPANY schema.
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.6
Defining Query 1 in (a) Access QBE and (b) Access SQL.
(a)
(b)
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.7
A Form for the EMPLOYEE table.
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition
Figure 10.8
An Access report titled Salaries by Department.
Salaries by Department
DNO
LNAME
FNAME
BORG
James
SALARY
1
$55,000.00
$55,000.00
4
JABBAR
Ahmad
$25,000.00
WALLACE
Jennifer
$43,000.00
ZELAYA
Alicia
$25,000.00
$93,000.00
5
ENGLISH
Joyce
$25,000.00
NARAYAN
Ramesh
$38,000.00
SMITH
John
$30,000.00
WONG
Franklin
$40,000.00
$133,000.00
Total Salaries
$281,000.00
© Addison Wesley Longman, Inc. 2000, Elmasri/Navathe, Fundamentals of Database Systems, Third Edition