In my experience, I've primarily used Python, particularly with libraries like Pandas for data manipulation and Matplotlib for data visualization. Additionally, I've worked with SQL for querying databases and Excel for data cleaning and basic analysis. For instance, during my internship at Exposys Data Labs, I used Python and SQL to analyze customer data, which helped in identifying key trends and patterns. This project involved cleaning and transforming the data to ensure accuracy and reliability, and then visualizing the results to present insights to the team.