a llxical data base
Creating and Management Data Base
Ngày tải lên :
01/09/2012, 09:09
... tạo.
Cú pháp:
CREATE DATABASE database_snapshot_name
ON
(
NAME = logical_file_name,
FILENAME = ‘os_file_name’
) [ , n ]
AS SNAPSHOT OF source_database_name
[;]
RDBMS and Data Management/ Session ... n a, nó có thể bị hủy bỏ
ALTER DATABASE database_name
{
<add_or_modify_files>
| <add_or_modify_filegroups>
| <set_database_options>
| MODIFY NAME = new_database_name
| COLLATE ... COLLATE collation_name ]
]
[;]
RDBMS and Data Management/ Session 7/16 of 25
Nhóm tập tin và ghi vết giao dịch
Thêm nhóm tập tin vào CSDL đã có:
Cú pháp
ALTER DATABASE database_name
{
<add_or_modify_files>
|...
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Báo cáo y học: "The epidemiology of medical emergency contacts outside hospitals in Norway - a prospective population based study"
Ngày tải lên :
25/10/2012, 09:56
... necessary
NACA 4 Development of vital (life threatening) danger possible
NACA 5 Acute vital (life threatening) danger
NACA 6 Acute cardiac or respiratory arrest
NACA 7 Death
Zakariassen et al. Scandinavian ... Grønlien,
and Jan Nystuen from the area of Innlandet, Unni Eskeland and Olav Østebø
from the area of Stavanger, and Leif Landa, Kari Hauge Nilsen, and Trond
Kibsgaard in the area of Haugesund. We want ... erik.zakariassen@isf.uib.no
1
National Centre for Emergency Primary Health Care, Uni Health, Bergen,
Norway, Kalfarveien 31, 5018 Bergen, Norway
Zakariassen et al. Scandinavian Journal of Trauma,...
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Báo cáo y học: "Comparative study of control selection in a national population -based case-control study: Estimating risk of smoking on cancer deaths in Chinese men"
Ngày tải lên :
26/10/2012, 09:48
... smok-
ing and cancer deaths, was not measured in this
study, and the separate calculation of risk patterns in
urban and rural areas was used as a surrogate analy-
sis by socioeconomic status.
In ... indication. Our
findings revealed that better equivalence exists in
urban than in rural areas, and for cancers with a high
death rate than for ‘rare’ cancers. The possible expla-
nations may ... can insure consistency
between the initial design and final analysis based on
symmetric CIs for estimation using a normal CI ap-
proach. Second, a large adequate sample size in each
compared...
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Module 6: Deriving a Physical Data Design
Ngày tải lên :
18/10/2013, 19:15
... type
(Double)
Float
(Long)
Integer
Integer value with double-precision data range
over regular integer data type
Every field within a database must have a data type. The data type allows you,
and the database engine itself, ... language that abstracts the operations performed on
a database into easily readable statements, such as Insert, Update, and
Delete. Most referential databases adhere to the ANSI SQL standard, ... There is no relationship between flat-file
databases because each database exists without knowledge of any other
database. Performance on this type of database is usually very good because of
its...
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Tài liệu Lecture 22: Digital Transmission of Analog Data (Baseband Transmission): doc
Ngày tải lên :
09/12/2013, 16:15
... Telecommunications, Winter 2000 Lecture-22 Digital Transmission
Digital Transmission of Analog Data (Baseband Transmission):
• Analog voice data must be translated into a series of binary digits ... transmission of analog information represents
a basic application of digital communications.
Sampling:
• It is an operation that is basic to digital signal processing and digital communication. ... an analog signal that are usually uniformly
spaced in time.
Sampling is usually described in time domain.
To get back the original analog signal we have to convert back the sampled signal...
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Tài liệu Module 4: Designing a User Data Management Strategy pptx
Ngày tải lên :
10/12/2013, 15:15
... Data?
What Is the Current Use of Offline Data?
?
?
?
What Is the Current Use of Roaming Data?
What Is the Current Use of Roaming Data?
Personal data
Personal business data
Shared business data
*****************************
ILLEGAL ... User Data Strategies
Determining the Organizational Requirements
Categorizing User Data Management Needs
Identifying Available User Data Management Options
Selecting Appropriate User Data ...
that Windows 2000
provides.
Lead-in
You can use quotas to
manage users’ data.
Important
Module 4: Designing a User Data Management Strategy v
Identifying Available User Data Management...
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Tài liệu Activity 4.2: Creating a Logical Data Model ppt
Ngày tải lên :
21/12/2013, 06:16
... 4.2: Creating a Logical Data
Model
In this activity, you will use the skills learned in this module to define the
relationships within a logical data model and produce a sample ER diagram for ...
the Ferguson and Bardell, Inc. case study.
In each of the two exercises in this activity, you analyze a single aspect of a
logical data design. At the end of each exercise, the class will discuss ...
cardinality and existence characteristics of each of the relationships defined in
Exercise 1.
!
Identify cardinality
1. For each relationship on your ER diagram, ask the question “How many...
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Tài liệu Module 4: Deriving a Logical Data Design doc
Ngày tải lên :
21/12/2013, 06:18
... Using a
Conceptual Design for Data
Requirements
Module 8: Designing
Data Services
Module 9: Data Storage
Considerations
Designing Data
Services and
Data Models
Logical Data
Design
Entities and
Attributes
Activity ... that must be addressed during logical data design
concern the data services, which determine how the data will be managed and
manipulated. Development of a logical design provides a road map ... 4: Deriving a Logical Data Design
Creating the Logical Data Model
Now that you know the syntax used for logical data models, you can produce an
ER diagram.
The ER diagram in the slide...
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Tài liệu A neural-network-based space-vector PWM controller for a three-level voltage-fed inverter induction motor drive doc
Ngày tải lên :
22/12/2013, 08:16
... Therefore,
it appears logical that a feedforward backpropagation-type
ANN which has high computational capability can implement
an SVM algorithm. Note that the ANN has inherent learning
capability that can ... voltage is balanced in
an open-loop manner. The frequency and voltage can be varied
from zero to full value in the whole undermodulation range. A
simulated DSP-based modulator generates the data ... bias time
and variable .The digital word corresponding to
as afunction of angle for both and states in all the phases
and in all the modes can be generated by simulation for training
a neural...
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Reliability analysis of a power system based on the multi state system theory
Ngày tải lên :
03/01/2014, 19:38
...
is above 22.8 Ah, the system is reliable, though the capacity of
a battery is lower than 5700 mAh. Suppose the capacity of the
first branch is 5600 mAh and the capacity of other branches are ... system is
not less than 22.8 Ah. To protect proprietary data, all
parameters have been scaled. This does not in any way affect
the validity of the method presented in this paper.
Figure 1. ... are b
inary, but they are all multi-state
actually. The performance of the batteries can degrade, which
results in performance degradation of the power system. So
there can be several states...
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Tài liệu Instructor Notes Module 4: Deriving a Logical Data Design pptx
Ngày tải lên :
17/01/2014, 09:20
... create a logical data model from
entities, attributes, and relationships.
After completing this module, students will be able to:
!
Analyze data requirements to determine data entities and attributes. ... P04_160 9a. ppt
!
Module 4, “Deriving a Logical Data Design”
!
Activity 4.1, “Deriving Entities and Attributes from Data Requirements”
!
Activity 4.2, “Creating a Logical Data Model”
Preparation ...
Analyze data entities and attributes to determine their relationships.
!
Determine the cardinality and existence characteristics of a relationship.
!
Create an entity/relationship diagram....
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Tài liệu Instructor Notes Module 6: Deriving a Physical Data Design doc
Ngày tải lên :
17/01/2014, 09:20
... will be able to:
!
Derive a physical data design for tables and fields from a logical data
design.
!
Analyze data usage characteristics to optimize a physical data design.
!
Determine methods ... rapidly. Note that
the data types listed in the workbook are generic. Actual data types will vary
depending on the databases that are used.
Instructor Notes Module 6: Deriving a
Physical ...
Module 6, “Deriving a Physical Data Design”
!
Activity 6.1, “Translating the Logical Data Design”
!
Activity 6.2, “Optimizing a Physical Data Design”
Preparation
To prepare for this module,...
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Tài liệu Activity 6.2: Optimizing a Physical Data Design pptx
Ngày tải lên :
17/01/2014, 09:20
... Solutions may include:
Replicate the database on the local client computer using MSDE,
and then upload the new information to the main SQL Server
database daily.
Create a separate database and table ... that
only accept timesheet data. Replicate this data to the main database
as needed.
5. Management must be able to run reports even if the rest of the system is
unavailable.
Solutions can ... can vary. Solutions may include:
Replicate the database on the local client computer using MSDE.
Create a separate reporting database that receives replicated
information on a periodic basis....
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Tài liệu Updating a Data Source with Data from a Different Data Source doc
Ngày tải lên :
21/01/2014, 11:20
... Team LiB ]
Recipe 4.7 Updating a Data Source with Data from a Different Data Source
Problem
You want to update a data source using changes made to another data source for data
replication ... that have changed in the
original data source. This DataSet is then used to apply the changes to a second
data source using its DataAdapter; the DataSet for the second data source is
reloaded. ... to a data source
using a DataAdapter. The data source to which the DataSet is reconciled is usually, but
does not have to be, the original data source.
The GetChanges( ) method of the DataSet...
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- bảoa trên data base
- updating a data source with data from a different data source
- digital transmission of analog data baseband transmission
- a morphological analysis based method
- a distributional similarity baseline
- the lexical system data bases
- interfaces to data base systems
- reading from a xml data type column in sql server
- a safety data sheet msds gives information about
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