Ans.  OLAP is a technical concept where, most often, a reporting tool is configured to understand your database schema and composition (facts [values and attributes) and dimensions [levels and descriptors]). By simple point-n-clicking, a user can run any number of  user-designed reports without having to know anything of SQL or the schema. 

 But Data mining is used for detailed analyses, often algorithmic, mining actually might produce “models” that might be analyzed. Data Mining is the “automatic” extraction of patterns of information from historical data, enabling companies to focus on the most important aspects of their business — telling them what they did not know and had not even thought of asking. 

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