ABSTRACT
This chapter presents essential data manipulation and for understanding how Mathematica works; shows how to import and export data and files in different formats. The basic structure in Mathematica is the list. The elements of a list can be numbers, variables, functions, strings, other lists or any combination thereof; they are written inside braces {} and are separated by commas. A fundamental feature of Mathematica is its capability for importing and exporting files in different formats. The Database Explorer is a graphical interface used to interact with databases. Sometimes, it may be useful to make a query and later on copy it to a notebook using its capabilities.
