A Tableau information extract is a compacted picture of data kept on a disc that is imported into memory when a Tableau visualization is needed. For a working definition, that’s reasonable.
TDEs are useful for assisting data analysis and data exploration due to two elements of their design. A TDE basically is a tabular story.
In TDE, the columnar databases will store column values instead of row values. Hence, there will be a decrease in input/output necessary for accessing and aggregating the digits in a column.