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Technical12 min readNovember 28, 2025

Advanced PostgreSQL Queries for N8n Workflows

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PostgreSQL is the backbone of many N8n automation workflows. In this article, we'll explore advanced query patterns that make your workflows more efficient.

JSONB Operations

PostgreSQL's JSONB type is incredibly useful for storing flexible data from APIs. Learn how to query, update, and index JSONB columns.

Upsert Patterns

The ON CONFLICT clause is essential for syncing data. We'll cover various upsert patterns for different scenarios.

Window Functions

Use window functions to calculate running totals, rankings, and time-based analytics directly in SQL.

Performance Tips

  • Always use indexes on frequently queried columns
  • Use EXPLAIN ANALYZE to understand query plans
  • Consider partitioning for large tables