how to make barcode in vb.net 2010 A Fact Table for Each Process 81 in Software

Draw Quick Response Code in Software A Fact Table for Each Process 81

4 A Fact Table for Each Process 81
Recognizing QR Code 2d Barcode In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Encoding QR Code ISO/IEC18004 In None
Using Barcode generator for Software Control to generate, create QR-Code image in Software applications.
) orders_query full outer Join ( select product.product, sum (shipment_facts.quantity_shipped) as quantity_shipped from day, product, shipment_facts Where ... joins and constraints on date ... ) shipments_query on orders_query.product = shipments_query.product
Reading Denso QR Bar Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Printing QR Code In Visual C#
Using Barcode generator for .NET framework Control to generate, create QR Code image in .NET framework applications.
This query looks complicated because it is complicated. It has two nested queries, which have been aliased orders_query and shipments_query. These two queries correspond to Phase 1 of the drill-across operation. They are subordinate to the main query, which joins them together based on the common dimension attribute, which is product. The main query corresponds to Phase 2 of the operation. Use of this form of SQL removes some of the DBA objections incurred by the use of temporary tables, but does not eliminate the DBMS overhead necessary to compute the results. While temporary tables are not explicitly created, joined, and dropped, the DBMS is doing the same work. The primary difference is that the application is not managing the various stages.
Creating Denso QR Bar Code In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
QR Code 2d Barcode Printer In .NET Framework
Using Barcode encoder for VS .NET Control to generate, create QR-Code image in Visual Studio .NET applications.
When Your Tool Cannot Drill Across
QR Code Creator In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create Quick Response Code image in .NET framework applications.
Bar Code Generator In None
Using Barcode generation for Software Control to generate, create barcode image in Software applications.
You may be using a reporting tool or business intelligence tool that does not support any of the drill-across methods described earlier. This is particularly likely if your reporting tool is cube-based; many OLAP tools permit interaction with a single cube at a time. Regardless of the reasons that prevent drilling across at report creation time, there is a solution: the drill-across operation can be performed in advance, with the results stored in a new fact table or cube. This single fact table is used for queries and reports that compare processes. The original fact tables are used when studying individual processes. You have already seen an example of a drill-across fact table. Figure 4-5 showed a single fact table storing facts from the orders and shipments processes. While this fact table hampered single-process analysis, where extraneous 0s had a nasty tendency to get in the way, it nicely supports cross-process analysis. TiP When available tools cannot drill across, or when drill-across reports suffer from poor performance, design and build a merged fact table that summarizes the processes at a common level of detail. This derived table performs the drill-across operation when the warehouse tables are loaded, instead of performing it at query time.
Code 39 Full ASCII Creator In None
Using Barcode encoder for Software Control to generate, create Code39 image in Software applications.
Encoding GS1 - 12 In None
Using Barcode creator for Software Control to generate, create UPC-A Supplement 5 image in Software applications.
Part ii
Barcode Maker In None
Using Barcode encoder for Software Control to generate, create barcode image in Software applications.
Drawing EAN / UCC - 13 In None
Using Barcode maker for Software Control to generate, create EAN 128 image in Software applications.
PART II
Printing ISSN - 10 In None
Using Barcode drawer for Software Control to generate, create International Standard Serial Number image in Software applications.
Scan Bar Code In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
Multiple Stars
Scan EAN-13 Supplement 5 In VB.NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Generate Bar Code In None
Using Barcode generator for Font Control to generate, create bar code image in Font applications.
The drill-across fact table, or merged fact table, can be implemented as a supplement to the process-specific fact tables. While this requires additional work during the load process, it pays dividends at query time. Even if your tools are capable of drilling across, this approach may improve performance. The merged fact table can be built using the process-specific fact tables as a source, rather than returning to the original data source. In this sense, it is a form of summary table, or derived table. It can also be implemented as a cube, rather than a star schema. The merged fact table, and other forms of derived tables, will be studied in more detail in 14, Derived Schemas.
Bar Code Generation In .NET Framework
Using Barcode generation for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
Decoding UCC - 12 In VS .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Summary
Creating Bar Code In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
EAN 128 Maker In Java
Using Barcode maker for Java Control to generate, create EAN 128 image in Java applications.
This chapter has taken the first major step away from the simplicity of a basic star toward the more complicated solutions demanded by the real world. You have learned how and why separate processes should be modeled in separate fact tables, and how to construct queries that perform cross-process analysis. When dealing with multiple processes, separate fact tables permit unhampered analysis of the individual processes. When you are unsure whether two facts describe different processes, check to see whether they occur at different times or exhibit different grain. If so, they represent different processes. When multiple processes are described in a single fact table, analysis of a single process is hampered. When combining information from multiple fact tables in a single report, joining two fact tables directly or through common dimensions can result in the overcounting of some facts, and a failure to count other facts. The proper way to combine information is to drill across in two phases. The first phase collects information from each star and aggregates it to a common level of detail. The second phase merges these result sets together. There are several ways to drill across. If none is supported by the toolset, or if performance is poor, a merged fact table or cube can be built that precomputes the results of a drill-across operation. As noted in this chapter, the ability to support both single-process analysis and crossprocess analysis is a powerful characteristic of a good dimensional design. This synergy relies heavily on consistent representation of dimensions and their values. The next chapter develops the concept of conformed dimensions, a crucial feature of every dimensional model. Organized properly, conformed dimensions allow analysis to cross processes and even subject areas, with powerful results. This chapter does not close the book on the topic of multiple fact tables. In addition to developing a separate fact table for each process, there are times when a single process may benefit from multiple fact tables. Different fact tables can provide unique perspectives on the same process. 8, More Slow Change Techniques, introduces three ways to describe a single process: transaction, snapshot, and accumulating snapshot variants.
Copyright © OnBarcode.com . All rights reserved.