> Reading Entry...Managed tables store data in the location managed by Databricks (usually DBFS or Unity Catalog managed storage). Dropping the table deletes the data. External tables reference data stored in your own cloud storage paths (S3/ADLS). Dropping the table only removes metadata.

> Reading Entry...Delta Lake uses a transaction log (Delta Log) to record every change made to the table. This enables atomicity (all or nothing), consistency, isolation (via optimistic concurrency control), and durability.

> Reading Entry...Z-Ordering is a data skipping technique that co-locates related information in the same set of files. It is most effective for columns that are frequently used in query predicates (WHERE clauses) and have high cardinality.

> Reading Entry...Photon is a native vectorized query engine written in C++ to improve query performance. It is designed to accelerate SQL workloads and DataFrame API calls by taking advantage of modern hardware instruction sets.

> Reading Entry...Unity Catalog is the unified governance solution for Data & AI on the Lakehouse. It provides a central place to manage permissions, audit logs, and data lineage across multiple Databricks workspaces.

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