Learn how DuckDB's ATTACH command lets you query multiple .duckdb files as if they were schemas, with a step‑by‑step example, limits, and common mistakes to avoid.

Community & Careers · Guide

multi-database sql

duckdb

Tasadduq Burneyowner

Started09 May 2026, 04:23 UTC

Level 33Owner26,525 rep points

Community & Careers

Article0 replies581 followingPosted 02 Aug 2025, 19:50 UTC85.3K views2,084 votes

Leveraging DuckDB's Automatic Column Pruning to Speed Up Wide Parquet Queries

Learn how DuckDB automatically prunes unneeded columns from Parquet files, see a concrete query example, verify the plan with EXPLAIN, and understand the limits of this optimization.

Community & Careers · Blog

vectorized-execution column-pruning parquet

Tasadduq Burneyowner

Started02 Aug 2025, 19:50 UTC

Level 33Owner26,525 rep points