ACID, a set of principles essential for transaction systems, comprises atomicity, consistency, isolation, and durability properties that ensure reliable transactions. Apache Druid, while not a transactional database, provides certain ACID-like guarantees suitable for analytics applications. Druid achieves atomicity through batch and real-time ingestion processes, committing data only when all components succeed, thus preventing inconsistent analytics results. Although it lacks traditional database constraints like primary and foreign keys, Druid maintains a form of consistency by rejecting non-conforming data and using commands like LATEST for retrieving current states. Isolation is upheld by handling data ingestion and query processes separately, minimizing read-write conflicts, while durability is secured by committing data to persistent deep storage, ensuring recovery in case of system failures. These capabilities allow Druid to manage large data volumes, real-time ingestion, and high query concurrency, aligning closely with the needs of modern analytics applications.