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 Informatica  |  Question 561 of 631    Print  
how do you measure slowly changing dimensions using lookup table

  
Total Answers and Comments: 1 Last Update: September 24, 2007     Asked by: hanumca07 
  
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September 24, 2007 13:41:04   #1  
vemurisasidhar Member Since: August 2007   Contribution: 10    
RE: how do you measure slowly changing dimensions usin...
the lookup table is used to split the data by comparing the source and target data. the data is branched accordingly whether to update or insert  
 
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Target Options for File Target type are FTP File, Loader and MQ.There are no target options for ERP target typeTarget Options for Relational are Insert, Update (as Update), Update (as Insert), Update 
Latest Answer : Target option for Flat file,relational file (update ,Insert).  ...
Can identify existing rows of data using unconnected lookup transformation. 
Latest Answer : 2 ways:1) Using an unconnected lookup and calling the same from an expression. based on the output, the particular set of rows can be filtered out and not be a part of target load data, by putting a filter right after the expression.2) using a connected ...
set of level properties that describe a specific aspect of a business, used for analyzing the factual measures of one or more cubes, which use that dimension. Egs. Geography, time, customer and product. 
Latest Answer : Dimensions are Categories by which summarized data can be viewed.Example: A Profit Summary in a fact table can be viewed by a Time Dimension(Profit by Year,Month,Quarter,Week,Day).Region Dimension(profit by Country,State,City).Product Dimension(Profit ...
Lookup Transformations can access data from relational tables that are not sources in mapping. With Lookup transformation, we can accomplish the following tasks:Get a related value-Get the Employee Name 
Latest Answer : Look up tranformations are used toGet a related valueUpdating slowly changing dimensionCaluculating expressions ...
Use lookup transformation in u’r mapping to lookup data in a relational table,view,synonym. Informatica server queries the look up table based on the lookup ports in the transformation.It compares 
Latest Answer : Lookup transformation in a mapping is used to look up data in a flat file or a relational table, view, or synonym. You can import a lookup definition from any flat file or relational database to which both the PowerCenter Client and Server can connect. ...
To perform the following tasks. Get a related value. For example, if your source table includes employee ID, but you want to include the employee name in your target table to make your summary data easier 
Latest Answer : Hi The ans to ur question is YesThere are 2 types of lookups: Dynamic and Normal (which you have termed as Static).To configure, just double click on the lookup transformation and go to properties tabThere'll be an option - dynamic lookup cache. select ...
Connected and unconnected  
Latest Answer : hello boss/madamonly two types of lookup are there they are:1) Connected lookup2) Unconnected lookup.I don't understand why people are specifying the cache types, I want to know that now a days caches are also taken into this category of lookup.If ...
Connected lookupUnconnected lookup Receives input values diectly from the pipe line.Receives input values from the result of a  lkp expression in a another transformation.U can use a dynamic or static 
Latest Answer : Hi Differences Between Connected and Unconnected LookupsConnected LookupUnconnected LookupReceives input values directly from the pipeline.Receives input values from the result of a :LKP expression in another transformation.You can use a dynamic ...
The informatica server builds a cache in memory when it processes the first row af a data in a cached look up transformation.It allocates memory for the cache based on the amount u configure in the transformation 
Latest Answer : A LookUP Cache is a Temporary Memory Area which is Created by the Informatica Server. which stores the Lookup data based on certain Conditions.  The Caches are  of  Three types 1) Persistent 2) Dynamic 3) Static  and 4) Shared ...
Persistent cache: U can save the lookup cache files and reuse them the next time the informatica server processes a lookup transformation configured to use the cache. Recache from database: If the persistent 
Latest Answer : There are five types of caches such as static cache,dynamic cache,persistant cache,shared cache, etc... ...

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