From ETL to Modern ELT
Legacy ETL
Rigid, slow pipelines where transformation happened before storage. Limited by compute/storage coupling.
Modern ELT
Load raw data first, transform inside the warehouse using high-performance SQL engines. Decoupled compute and storage.
The Power Players
Snowflake
The pioneer of separation of storage and compute. Multi-cluster shared data architecture.
BigQuery
Serverless, highly scalable, and deeply integrated with the GCP ecosystem. ML-native SQL.
ClickHouse
Extreme performance for real-time analytics. The king of sub-second OLAP queries.
Code is the New Configuration
The dbt Revolution
Data modeling has moved from GUI-based tools to version-controlled SQL projects. CI/CD for data is now a standard requirement.
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DWH + Generative AI
The warehouse is no longer just for BI. It's the memory for AI models.
Vector Storage
Native support for embeddings within the warehouse (pgvector, Snowflake Cortex).
RAG Pipelines
Retrieval-Augmented Generation directly on enterprise data for contextual LLM responses.