Answer Posted / sandeep.t nizamabad
OLTP SYSTEMES CONTAINS
1.FLAT FILES
2.DBASE
3.ORACLE
4.SAP
WE WILL EXTRACT THE DATA FROM OLTP TO STAGING LAYER
AND CONVERT THE DATA FROM INCONSISTENT TO CONSISTENT FORM
BEFORE LOADING TO DWH.
DWH IS NOTHING BUT OLAP SYSTEMS
IT CONTAINS DEPTS. LIKE FINANCE,SALES,PURCHASE,H.R
DATA MARTS ARE SUBSETS OF AWHWHICH ARE USED TO SATISFY THE
REPORTING REQUIREMENTS OF A DEPTS
Eg: SALES , FINANCE,PURCHASE,HR
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