When processing data, we tend to be lazy and read all the data into memory before processing it. This is not a problem when the data size is small, but when dealing with huge data, it consumes a lot of memory and takes a long time because …

Tableau is intuitive, and you can create graphs by dragging and dropping with the mouse. However, when trying to port Excel graphs to Tableau, sometimes it is not possible to create a graph properly using only mouse operations. Such graphs…