The book is the second, updated and supplemented, edition of the tutorial "Methods and Models of Data Analysis. OLAP и Data Mining». The main directions in the field of enterprise systems development are described: data warehousing, distributed, online (OLAP), intelligent (Data Mining), visual (Visual Mining) and text (Text Mining) data analysis. Methods and algorithms for solving the main analysis problems are described: classification, clustering, etc. The description of the idea of ​ ​ each method is supplemented by a specific example of its application.