Delta

Delta Lake is an open-source storage framework that enables building a Lakehouse architecture with compute engines, including Spark, PrestoDB, Flink, Trino, and Hive, and APIs for Scala, Java, Rust, Ruby, and Python.

ACID Transactions - Protect your data with the strongest level of isolation

Time Travel - Access to earlier versions of data for audits, rollbacks, or reproduce.

Open Source - Community Driven.

DML Operations - SQL,Scala,Python APIs to merge, update and delete data.

Audit History - Delta Lake logs all changes details providing a complete audit trail.

Schema Evolution/Enforcement - Prevent bad data from causing data corruption.

Unified Batch/Streaming - Exactly once ingestion to backfill to interactive queries.

Delta table is the default data table format in Databricks.