Delta Lake Operations - 01
2 Scenarios
50 Minutes
Intermediate
Industry
general
Skills
approach
data-understanding
data-storage
data-quality
batch-etl
data-wrangling
Tools
databricks
Learning Objectives
Understand the concept of Delta Time Travel
Understand how to reduce small files and improve query performance by optimizing Delta tables.
Learn how to use the VACUUM command to reclaim storage space by deleting old, unused files
Overview
This module explores Delta Lake’s Time Travel feature and optimization techniques. Time Travel enables querying and restoring previous table versions, helping recover deleted records, track changes, and fix ELT pipeline issues. The module also covers performance optimization using the OPTIMIZE command to handle small files, Z-Ordering for efficient queries, and VACUUM to clean up unused files and manage storage. These techniques ensure data consistency, integrity, and efficiency in your data pipeline.
Prerequisites
- Basic knowledge of Delta Lake and Delta tables.
- Familiarity with SQL queries and Databricks environment.