Entity integrity is a fundamental principle in database management that ensures every record within a table can be uniquely identified. It achieves this by implementing primary keys, which serve as unique identifiers for each row in a relational database table. These primary keys prevent duplicate and null values in the key field, guaranteeing accuracy and data reliability. Entity integrity safeguards our trust in data by ensuring that no two rows in a table can share the same identifier and that every row has a valid, non-null identifier. This makes the data consistent and helps maintain the database's logical structure. By enforcing primary keys and disallowing duplicates or null values, entity integrity supports reliable entity relationships, enables logical database design, maintains data consistency across operations, and is built on a framework of rules and constraints that ensure the uniqueness and accuracy of data within relational databases. Understanding its components is key to implementing and maintaining robust database systems. Entity integrity plays a critical role in real-world database management across various industries, including banking and financial services, healthcare, e-commerce, and others, supporting seamless operations, compliance, and decision-making. To maintain entity integrity, organizations can leverage primary keys, enforce constraints at the database level, automate data validation, implement master data management systems, and conduct regular database audits. Modern tools like Acceldata also support entity integrity management by providing advanced anomaly detection, data validation, and lineage tracking capabilities. By embracing best practices and advanced technologies, businesses can prevent errors, streamline operations, and unlock the full potential of their data.