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 ETL  |  Question 61 of 64    Print  
Clean Data before Loading
Why is it necessary to clean data before loading it into the Warehouse


  
Total Answers and Comments: 0 Last Update: September 17, 2008     Asked by: riyazz.shaik 
  
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Answered by Laxmi on 2005-05-13 16:42:53: Staging area is place where you hold temporary tables on data warehouse server. Staging tables are connected to work area or fact tables. We basically need staging 
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Techniques of Error Handling - Ignore , Rejecting bad records to a flat file , loading the records and reviewing them (default values)

Latest Answer : ODS is nothing but operational data source. It contains  most recent data .it contains around 30-60 days data  It is placed in between source system and staging area..   reports can also be taken in ODS . ...
Read Answers (7) | Asked by : kumar

What are the various test procedures used to check whether the data is loaded in the backend, performance of the mapping, and quality of the data loaded in INFORMATICA.
Read Answers (3) | Asked by : Andy

I'am new to SAS, can anybody explain the process of extracting data from source systems,storing in ODS and how data modelling is done.RegRam
Read Answers (3) | Asked by : ram_sas

Latest Answer : By enablign sorted input property in Aggregator Properties ...
Read Answers (1) | Asked by : srujen

How you capture changes in data if the source system does not have option of storing date/time field in source table from where you need to extract the data?
The DW database can be Oracle or Teradata. The requirement here is to pull data from source system and ETL need to device a mechanism to identify the changes or new records. The source system can be a 
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Latest Answer : Hi,     Yes, We Can Test By Using Debugger before u run the session in Informatica ...
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