E-R modelling is used for OLTP systemsDimesional modelling for data modelling of datwarehouse.why is this so.what is the difference between E-R modelling and dimesional modelling.thank in advance.

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srinuv_11

  • Nov 15th, 2006
 

Datawarehouse means it is the repository of integrated information in this OLTP part is there and OLAP part is also there E-R model it is the poor model and it is difficult to understand  and it will not understand without knowing the pl/sql but in the case of Dimensional model it is the new model any body  can understand without knowing pl/sql and client can understand easily.

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