Can you explain Snowflake’s zero‑copy cloning, time travel, and Snowpipe setup?

Zero‑copy cloning lets you create a clone of a database, schema, or table without copying the underlying data; the clone shares the same data blocks and only stores metadata changes, making it instant and cost‑effective. Time travel allows you to query data as it existed up to 90 days (or 1 day for standard accounts) in the past, enabling point‑in‑time queries, restores, and auditing. Snowpipe is Snowflake’s continuous ingestion service that automatically loads files from a stage into a table as soon as they appear. You set it up by creating a stage, defining a pipe with a COPY INTO statement, and configuring a notification service (S3, Azure, GCS) or REST API to trigger the pipe. Together, these features provide rapid, low‑cost data replication, historical access, and real‑time ingestion.