ETL without tools

Post Author: sony
CA Forum: Olap
1.I am creating a data warehouse without using any  ETL tools from the OLTP.For this , i can fetch the  data by using  aggreegate concept. How many other ways by which i can fetch the data?2. How to use incremental approach and fullfresh Approach to build data warehouse for automatic updation?3. Details of logical data model and Physical data model.

Post Author: amr_foci
CA Forum: Olap
1- i hope i got you right,, u want to populate ur data warehouse without using any tools??
you can do that using database Links "its supportred by oracle", or even you can use SQL loader for oracle too, or to export and import ur data using flat files
2- for  incremental approach (CDC) capture data changed, u can put an access date filed in ur source database, and when you select from the source to the destination keep in mind the creteria of that filed
hope this helps you

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