First of all, I want to say that I think you are a college student! Data mining is not as simple as you think. It is not only related to mathematics, but also includes many disciplines in the computer field. There are social engineering, logic and other interdisciplinary subjects! He is a huge system. If you really want to learn, I can only show you a faster road to success, and you can learn the rest yourself slowly! Enrich yourself slowly! Make good use of the university for four years! There is no end to learning!
Since it is data analysis, your advanced mathematics must be excellent. Don't worry, this is just the basic course of your other subjects. The second is probability statistics, which is the main course. Things in college are just fooling people. You should read more books on this subject. This must be learned well! Linearity must be mastered. Because data partition is the most important link in data mining. This belongs to the linear category. You should also be proficient in linear analysis and you will find that you have learned a lot. It is enough to have these three foundations in mathematics. Don't look at mathematical analysis. Because that's just an extension of high numbers!
You must know computers. You have to study the database. Oracle Bone Inscriptions's principle. SQL.MYSQL in the three major databases are basically similar by analogy!
There is also to cultivate your own thinking and try to be careful and agile. Only in this way can we find the difference of data! Because some data mining is processed by computer. Some are on paper. So you must learn to record.
Ok, that's all for the time being. What you have learned is the basis for your next step, which is enough for you to study for a while.
Good luck, man!