barcode vb.net 2010 Type 2 Not Sufficient in Software

Generate QR Code JIS X 0510 in Software Type 2 Not Sufficient

Type 2 Not Sufficient
QR Code 2d Barcode Decoder In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Make QR Code JIS X 0510 In None
Using Barcode printer for Software Control to generate, create QR image in Software applications.
A type 2 slowly changing dimension preserves the history of values of an attribute and allows each fact to be associated with the correct version. Although this preserves the history of facts, it is not sufficient to provide for point-in-time analysis. What version was current on a particular date Unless a fact exists for the date in question, it is impossible to know. This is best understood via an example. The star in Figure 8-1 has a policy dimension similar to the one seen in 6. The table includes numerous attributes describing significant characteristics of a health insurance policy.
QR Code ISO/IEC18004 Decoder In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Painting QR Code In Visual C#
Using Barcode generator for .NET Control to generate, create QR Code image in Visual Studio .NET applications.
8 More Slow Change Techniques 173
Encode QR Code In VS .NET
Using Barcode printer for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Generating QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
DAY PAYMENT_FACTS INVOICE day_key invoice_key customer_key policy_key . . . (facts) . . .
Creating QR Code 2d Barcode In VB.NET
Using Barcode generation for .NET framework Control to generate, create QR-Code image in .NET applications.
Encode European Article Number 13 In None
Using Barcode drawer for Software Control to generate, create European Article Number 13 image in Software applications.
POLICY SK policy_key NK policy_number 2 policy_holder 2 address marital_status 2 family_size 2 covered_parties 2 covered_children 2 deductible_amount 2 . . .
Code 128 Code Set C Creation In None
Using Barcode encoder for Software Control to generate, create Code 128 Code Set C image in Software applications.
Print GTIN - 128 In None
Using Barcode creation for Software Control to generate, create USS-128 image in Software applications.
CUSTOMER
Generate UPCA In None
Using Barcode printer for Software Control to generate, create UPC-A Supplement 5 image in Software applications.
Barcode Generator In None
Using Barcode printer for Software Control to generate, create barcode image in Software applications.
POLICY policy_ policy_ key number 12882 12911 13400 14779 14922 40111 40111 40111 40111 40111 policy_ holder address marital_ family_ covered_ covered_ deductible status size parties children _amount Single Married Married Married Married 1 2 2 3 4 1 1 2 3 4 0 0 0 1 2 250 250 250 250 500
Create I-2/5 In None
Using Barcode maker for Software Control to generate, create USS ITF 2/5 image in Software applications.
Data Matrix Drawer In None
Using Barcode creator for Font Control to generate, create Data Matrix image in Font applications.
Smith, Hal 113 Random Rd. Smith, Hal 113 Random Rd. Smith, Hal 113 Random Rd. Smith, Hal 113 Random Rd. Smith, Hal 113 Random Rd.
Create Bar Code In Java
Using Barcode generation for Android Control to generate, create bar code image in Android applications.
Recognize Code 128A In VB.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET framework applications.
Figure 8-1
Bar Code Maker In Java
Using Barcode creator for Java Control to generate, create barcode image in Java applications.
Draw Universal Product Code Version A In Visual Studio .NET
Using Barcode creator for .NET Control to generate, create GS1 - 12 image in .NET applications.
Type 2 changes in a policy dimension
USS Code 39 Generation In Java
Using Barcode creator for Android Control to generate, create Code 3/9 image in Android applications.
Generate Matrix Barcode In Java
Using Barcode generation for Java Control to generate, create 2D Barcode image in Java applications.
The history of these attributes is carefully followed by the business, so they are designated as type 2. The policy dimension table is associated with a fact table that tracks policy payments that have been made by the policy holder. The slow changes that accumulate for one particular policy are illustrated in the lower part of the figure. Policy number 40111 is held by someone named Hal Smith and apparently has been active for quite some time. You can see that the policy has undergone several changes. Initially, Hal was single and his policy covered himself alone. Later, he married, but coverage was not added for his spouse. Subsequently, his spouse did become covered, and still later coverage was added for a child. When coverage was added for a second child, you can see that Hal also increased his deductible. The insurance company needs to be able to understand what each policy looked like at any given point in time. For example, users might want to know how many policy holders were married versus how many were single on a particular date, or what the total number of covered parties was at the close of a fiscal period. Policy payments are completely irrelevant to this analysis.
Part III
PART III
Dimension Design
Unfortunately, the design in Figure 8-1 is not able to answer these questions. Although the dimension table records all the changes to policies, it does not associate them with specific time periods. Was Hal married on November 1, 2005 The dimension table tells us that at different times he has been single and married, but not when. Unless there happens to be a row recorded for the policy in payment_facts for November 1, 2005, there is no way to know what the policy looked like on that date.
Tracking Change History Through a Fact Table
Point-in-time analysis of a closely watched dimension can be supported by creating a fact table expressly for the purpose. A row is recorded in the fact table each time the dimension changes. Each row in this fact table contains a foreign key identifying the new row in the dimension table, and one identifying the date it became effective. An additional foreign key can be maintained to indicate the date on which the row expired, which will help produce point-in-time analysis. If each change occurs for a particular reason, this may be captured via an additional dimension. An example appears in Figure 8-2. The fact table in the figure, policy_change_facts, logs changes to the policy dimension. Its grain is one row for each policy change. Each row contains a policy_key representing the changed policy. A transaction type dimension contains reference information indicating the reason for the change a new policy, a policy change, or policy cancellation. Two keys refer to the day dimension. Day_key_effective indicates the day on which the policy change went into effect. Day_key_expired will be used to indicate when it was superseded by a new version.
DAY POLICY_ CHANGE_FACTS day_key_effective day_key_expired policy_key transaction_type_key . . . (facts, if any) . . .
POLICY policy_key SK policy_number NK policy_holder 2 address 2 2 marital_status family_size 2 covered_parties 2 covered_children 2 deductible_amount 2 . . .
Copyright © OnBarcode.com . All rights reserved.