Tableau is a business intelligence and visual data analytics tool which sources the data either from the file-based system or RDBMS and processes them with statistical functions to generate graphs and charts. It gives us the trends, variance, and density within the data. This tool is also outstanding because the business started to get smarter and investors and organizations need trends to understand the customer interest. In many ways, whether it might be data collections or processing or presenting the data, Tableau stands alone in this analytics World. Tableau possesses a robust and dynamic calculation language which makes it quite easy for analysis with complex valuations and data manipulations in the background. Tableau has many built-in options with statistical calculations such as standard deviation, kurtosis, mean, mode, skewness, correlation, and covariance. Challenging database tasks such as manipulating summarised data, complex lags, complex data structure can be easily resolved by simple tableau expression with help of tableau table calculations. Tableau invests its ideas in advanced analytics so that even though the data is complex you can get to the root of your questions quite easily.