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Also shipped Sep 30, 2025MotherDuck in September 2025 →

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Performance improvements

- Sorting is 2x+ faster: Complete rewrite of sorting uses less memory and scales better across threads for ORDER BY, window functions, and list sorting More efficient small writes: Appending small numbers of rows now writes far fewer bytes 5x faster checkpointing: Reuses table metadata when tables aren't altered during checkpoint Parallel connection...

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SQL syntax updates

- MERGE INTO statement: Standard SQL upserts without requiring primary keys or indexes FILL() window function: Interpolate missing values in ordered data Python-style macro arguments: Macros accept positional or named arguments for any parameter STRUCT to MAP cast: Direct casting between struct and map types

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Parquet improvements

- VARIANT type reading: Read Parquet VARIANT types for faster semi-structured data processing Native geometry type writes: Write native Parquet geometry types Auto-globbing for directories: Automatically treats paths as directories and retries with glob patterns when no file is found Learn more in the official DuckDB Labs announcements for 1.4.0 and 1.4.1 .

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[Preview] DuckLake 0.3

As we announced earlier this year, MotherDuck now supports DuckLake , an integrated data lake and catalog format. DuckLake 0.3 makes working with DuckLake more robust, including CHECKPOINT for easy maintenance , new paths for Iceberg interoperability, spatial geometry types , and MERGE INTO support .

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- DuckDB 1.4.2: MotherDuck supports DuckDB 1.4.2, a bugfix release

- DuckDB 1.4.2: MotherDuck supports DuckDB 1.4.2, a bugfix release. Learn more in the official DuckDB Labs 1.4.2 announcement and changelog . Full command menu now at Cmd/Ctrl+K : Access common MotherDuck UI actions from your keyboard, including generating query edits, adding notebook cells, creating notebooks, and navigating between pages.

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