Put forward 3000 questions about data warehouse.
What is a data warehouse?
Data warehouse (DW or DWH)
It is a collection of data storage, inputting a variety of raw data, sorting and storing according to the standard and standard data architecture,
It can provide fast, effective, accurate and reliable data support for enterprise decision-making and downstream applications,
It is mainly used in data mining, data analysis, data report and various data applications.
What are the characteristics of data warehouse?