The 4 aspects of the data warehouse are as follows: Firstly, data collection is gathering information from different sources and storing it in a single data warehouse. Secondly, data management is organizing and managing data once it has been collected to store it in a structured and accessible format. Thirdly, data analysis is analyzing and interpreting data to make informed and effective decisions. Fourthly, data visualization presents data in a graphical format to be easily understood and interpreted.