What kind of important role does data warehouse play in the trend of database technology development?

Database storage of data is a two-dimensional storage logic, if you want to locate a data, through several tables to jointly query, you need to traverse the tables involved, inefficient.

And the data warehouse with block logic for storage, through several logical tables to query the fact table, at the same time to locate, directly fetch the number, the speed of several orders of magnitude.

And the data warehouse divides the data according to dimension tables and fact tables, which is more conducive to doing OLAP analysis, provides more imagination for data visualization, and provides decision support for policy makers and leaders.