Definition
Transforming data means changing its format, structure, or values to make it more suitable for a specific purpose. This process involves cleaning, organizing, and restructuring raw information into a more usable and understandable representation. In practice, data transformation is often a key step in data pipelines, where raw data from various sources is processed before being loaded into a target system or used for analysis. It matters on the job because effectively transformed data leads to more accurate insights, improved system performance, and better decision making. For instance, converting dates from 'MM/DD/YYYY' to 'YYYY-MM-DD' format is a common data transformation. This differs from data validation, which checks if data meets certain criteria, whereas transformation alters the data itself. You will encounter data transformation concepts in domains like data management and analysis, relevant for certifications such as PMP and CAPM.