• Vandana Sahu
• Rahul Chawda

Information sources are increasingly self-sufficient and they regularly change their substance because of never-ending exchanges and may change their structure because of ceaseless clients' prerequisites advancing outline changes. Dealing with legitimately all kind of changes is an unquestionable requirement. Information Warehousing is considered as the centre part of the cutting edge choice emotionally supportive networks needs to refresh as indicated by various sort of advancement of data sources to mirror this present reality subject to investigation. In this paper, we present an overview on right now accessible information security procedures, concentrating on explicit issues and prerequisites concerning their utilization in information warehousing conditions. We additionally call attention to difficulties and open doors for future research work in this field.

Data warehousing , Types Data Warehouse, Applications of Data Warehouse, Data warehouse approaches, Data warehouse Components.

"A Survey about Approaches Used in Data Warehousing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.338-341, May-2019, Available :http://www.jetir.org/papers/JETIR1905B48.pdf

"A Survey about Approaches Used in Data Warehousing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp338-341, May-2019, Available at : http://www.jetir.org/papers/JETIR1905B48.pdf