Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 3 potx
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 3 potx
... Chapter 2:
ț Source data
Production data
Internal data
Archived data
External data
ț Data staging
Data extraction
Data transformation
Data loading
ț Data storage
ț Information delivery
ț Metadata
ț ... internal and external data sources form the source data
architectural component. Source data governs the extraction of data for preparation and
storage in the dat...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 6 potx
... Data
1 23 AAAAA
234 BBBBB
34 5 CCCCC
DATA
STAGING
Key Data
1 23 AAAAA
234 BBBBB
34 5 CCCCC
DATA
STAGING
Key Data
1 23 AAAAA
234 BBBBB
34 5 CCCCC
DATA
STAGING
Key Data
1 23 AAAAA
234 BBBBB
34 5 CCCCC
DATA
STAGING
B
EF
O
R
AF
TE
R
Key ... BBBBB
34 5 CCCCC
WAREHOUSE
Append
Destructive
Merge
Key Data
1 23 PPPPP
WAREHOUSE
Key Data
1 23 AAAAA*
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234 BBB...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 8 potx
... organizations gather enterprise data from the source operational systems,
move the data through a transformation and cleansing process, and store the data in data
warehouses in a form suitable for ... data security a major concern for a Web-enabled data warehouse?
8. List any four features of the data Webhouse.
9. Name any two approaches for an OLAP system to funct...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 1 ppt
... a data warehouse is not as
volatile as the data in an operational database is. The data in a data warehouse is primarily
for query and analysis.
Data Granularity
In an operational system, data ... the market with numerous
data warehousing products. Vendor solutions and products run the gamut of data ware-
housing data modeling, data acquisition, data quality, dat...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 2 ppt
... QUERY
RESULTS
RESULTS
Figure 3- 8 Integration of KM and data warehouse.
Types of Metadata
Metadata in a data warehouse fall into three major categories:
ț Operational Metadata
ț Extraction and Transformation Metadata
ț ... Component
Metadata in a data warehouse is similar to the data dictionary or the data catalog in a
database management system. In the data dictionary, y...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 5 docx
... source operational systems, data extraction tools, data
transformation tools, the data dictionary definitions, and other sources all contribute to
the data warehouse metadata. Metadata management, ... navigate through the data ware-
house and any data marts.
From the outset, pay special attention to metadata for your data warehouse environ-
ment. Prepare a metadata initiativ...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 7 ppt
... poten-
tial effect of bad data. The low-priority data may be cleansed if you have any time and re-
DATA QUALITY INITIATIVE
30 9
DATA
QUALITY
INITIATIVES
DATA
CONSUMER
(User Dept.)
DATA
EXPERT
(User ... demand a warranty on data quality. In spite of what the
vendor might profess about the quality of the data, for each set of external data, set up
some kind of data quality...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 9 pdf
... just a couple of ex-
amples. Review all the initialization parameters and set each appropriately.
Data Arrays
What are data arrays? Suppose in a financial data mart you need to keep monthly balances
of ... suitable for low-selectivity data? Why?
9. What is data partitioning? Give two reasons why data partitioning is helpful in a
data warehousing environment.
10. What is...
Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 10 pot
... start with a large volume of data,
even a small percentage increase can result in substantial additional data.
In the first place, a data warehouse may contain too much historical data. Data ... Backup
Referential integrity, 451
Refresh, data, 282–2 83. See also Data loading
Replication, data, 266–268
Reports, 33 2 33 3
Requirements
driving force for
architecture plan, 1...
data warehousing fundamentals a comprehensive guide for it professionals phần 4 ppsx
... the classification of metadata types by the functional areas in the
data warehouse:
1. Data acquisition
2. Data storage
3. Information delivery
Data Acquisition
In this area, the data warehouse ... summary list of processes in which metadata is significant for IT:
ț Data extraction from sources
ț Data transformation
ț Data scrubbing
ț Data aggregation and summarization...
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