The data_preprocessing files (countries_preprocessing.ipynb and Suicidedata_preprocessing.ipynb) are files that clean up the datasets and visualize features and distributions of the datasets.
The database file (suicide_database.ipynb) uses sqlite to link the different datasets, allowing easy retrieval of data.
The machine learning file (suicie_machine_learning.ipynb) discusses the regression models used to predict suicide rate, and make inferences on what features are important predictors.