Blogs on OLake
Handling Changing Data Types in Semi-Structured Data Ingestion
Explore 7 techniques to manage polymorphic keys and evolving data types in semi-structured data ingestion. Learn schema enforcement, type promotion, and more.
How to Query Semi-Structured JSON Data in Snowflake | OLake Guide
Learn to query JSON in Snowflake using VARIANT, FLATTEN, LATERAL FLATTEN, and JSON functions. Includes loading methods and best practices for nested data.
MongoDB ETL Challenges: Key Issues & Best Practices 2025
Explore critical MongoDB ETL challenges including schema flexibility, data consistency, incremental loads, and nested data transformations.
How to Set Up PostgreSQL CDC on AWS RDS - A Step-by-Step Guide
We have observed a large number of people not setting up their databases with CDC or having to set up CDC after they start ingesting and finding it complex...
Troubleshooting MongoDB ETL Errors: Solutions & Best Practices
Discover common MongoDB ETL errors, causes, and practical troubleshooting tips to optimize ETL workflows for MongoDB and data warehouse integration.