Answer 1

data warehousing is the act of compiling and arranging data in an orderly manner into one common database while data mining is the act of getting useful data from that common database. This also applies for database BUT database has 1 major difference between data-warehouse.
data-warehouse is mostly read-only, it is mainly created for analysis/checking of data. While database is mainly created for processing events and changing itself,etc. Hence, a data-warehouse is more suited for reading compared to a database, but less suited for processing events.