Can I query across a database, a warehouse and a SaaS API without copying the data first?

Yes, you can query across relational databases, cloud warehouses, and SaaS APIs in place without moving or copying your data first using SemanticFed[1].

SemanticFed is designed as a governed data federation platform that unifies disparate systems:

• Connect sources in place: You register your relational databases, cloud warehouses, and SaaS REST or GraphQL APIs directly via the connector registry without bespoke glue code or pipeline migrations (Connect Any Source[2]).
• Virtual federated views: Instead of maintaining ETL jobs, you define relationships and virtual views across your federated sources. Transformations and joins execute at query time with no materialized copy to maintain (Retire Brittle ETL with Virtual Views[3]).
• Push-down query optimization: SemanticFed's query planner pushes down predicates, projections, and aggregations directly to the source engines—databases and warehouses alike—minimizing data transfer and keeping query execution fast (SemanticFed vs Snowflake[4]).
• Unified interface: Consumers, business intelligence tools, and AI agents can query the entire governed model through a single SQL or GraphQL endpoint.

To start federating across your sources, get started with SemanticFed[5].