data warehousing architecture andimplementation phần 9 pps
data warehousing architecture andimplementation phần 9 pps
... delete data from the data
warehouse or the data mart.
Using Derived Columns
R/OLAPXL allows you to enter formulas to derive new values based on data retrieved from
the data warehouse or data ... past, the retrieved data should still be visible on the
worksheet.
Running the report causes R/
OLAPXL to retrieve the requested data from the database. Any
previously retriev...
data warehousing architecture andimplementation phần 4 ppsx
... the data warehouse,
as illustrated in Figure 5 -9
.
Figure 5 -9 Tiered Data Warehousing Architecture
It will not be unusual to find an enterprise with the following tiered data warehousing
architecture: ...
Figure 5-5 Data Warehouse Components
Do I Still Use Relational Databases for Data
Warehousing?
Although there were initial doubts about the use of relational...
data warehousing architecture andimplementation phần 6 ppsx
...
Figure 9- 5 presents a typical data warehouse schema.
Figure 9- 5 Sample Warehouse Schema
Set Up Warehouse Metadata
Metadata have traditionally been defined as " ;data about data. " ... for the
data warehouse.
Several types of transformations are typically implemented in data
warehousing.
• Format changes. Each of the data fields in the operational
systems may...
data warehousing architecture andimplementation phần 8 ppsx
... warehouse.
• Warehousing trends. This chapter looks at trends in data warehousing
projects.
Examples include:
• The 199 5 acquisition of Stanford Technological Group by Informix
• The 199 5 acquisition ...
• The 199 6 acquisition of Panorama Software Systems (and their OLAP technology)
by Microsoft Corporation
• The 199 7 merger of Carleton Corporation and Apertus Technologies...
data warehousing architecture andimplementation phần 1 pptx
... Warehouse Metadata
Metadata Are a Form of Abstration
Why Are Metadata Important?
Metadata Types
Versioning
Metadata as the Basis for Automating Warehousing Tasks
In Summary
14. Warehousing ... Online Data Warehousing Resources
C. Online Data Warehousing Resources
D. Tool and Vendor Inventory
D. Tool and Vendor Inventory
E. Software License Agreement
Metad...
data warehousing architecture andimplementation phần 2 potx
... Enterprise Architecture, the elements of which we have discussed.
Figure 1-22 The InfoMotion Architecture
Differences Static Data Volatile Data
Historical Data Current Data
Summarized Data ... their data (e.g., credit bureaus).
Also stored in the databases are the metadata that describe the contents of the data
warehouse. A more thorough discussion of metadata their...
data warehousing architecture andimplementation phần 3 pdf
... unrelated data marts.
Metadata Administrator
The metadata administrator defines metadata standards and manages the metadata
repository of the warehouse. The workload of the Metadata Administrator ... any data
warehousing effort. This chapter attempts to answer the typical questions
of CIOs who participate in data warehousing initiatives.
How Do I Support the Data Warehouse?...
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... Preliminary Architecture per Rollout
At a minimum, the preliminary architecture should indicate the following:
• Data warehouses and data mart. Define the intended deployment of data
warehouses ... and data marts for each rollout. Indicate how the different databases
are related (i.e., how the databases feed one another). The warehouse architecture
must ensure that the di...
data warehousing architecture andimplementation phần 7 pdf
... Trail for Data
Transformation
Metadata document the transformation of source data into warehouse data.
Warehouse metadata must be able to explain how a particular piece of
warehouse data was ... Metadata Important?
Metadata are important to a data warehouse for several reasons. To explain
why, we examine the different uses of metadata.
Metadata Establish the Context of the War...
data warehousing architecture andimplementation phần 10 pdf
...
R/OLAPXL Sample Retail Database
The sample Retail database contains data for the months of February to May for the years
199 6 and 199 7.
Sales Fact
Field Name Null? Data T
y
pe Remarks
UNITS_SOLD ...
(http://www.pwp.starnetinc.com/larryg/index.html)
Data Warehousing on the World
Wide Web
(http://www.datawarehousing.com)
The Data- Warehouse.Com Site (http://www .data- war...
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