Answer
FDWs enable PostgreSQL to query external databases or APIs, supporting federated queries and hybrid architectures.
Quick Answer
FDW in enterprise: query distributed data without ETL. postgres_fdw connects to remote PostgreSQL. Use for: reporting across multiple databases, migrating data incrementally, federated queries across regions, or accessing legacy systems. Push-down optimization: the FDW sends WHERE conditions to the remote server to filter data before transmission. Enterprise systems use FDW for data virtualization layers.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ