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hi my name is GERD Edmondson and welcome to another in my series of videos about data warehouse and ETL this series of videos is focusing in on ETL the different aspects of ETL that are important when constructing an overall data warehouse solution as before if youve not seen the previous videos I highly recommend that you at least start at the beginning of this series of videos as they cover important concepts that Im going to briefly mention and that have much more detail behind them so to begin with todays videos will be about table partitioning a table partitioning is one of the best ways to get good performance out of your ETL process DML or data manipulation language consists of inserts updates and deletes one of the chief complaints I hear about the dimensional modeling is the size of fact tables many people are intimidated by fact tables that are many multiples of billions of rows and that being able to perform updates inserts and deletes on those tables can take too long s