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- Benchmarks 11997
- For several of the recommendations in our performance guide, we use microbenchmarks to back up our claims. For these benchmarks, we use datasets from the TPC-H benchmark and the LDBC Social Network Benchmark's BI workload . Datasets We use
..., feel free to contact us at gabor@duckdb.org . Disclaimer on Benchmarks Note that the benchmark results presented in this guide do not constitute official TPC or LDBC benchmark results. Instead, they merely use the datasets of and some queries provid... - https://man.mtool.work/duckdb/2.0/guides/performance/benchmarks.html
- Troubleshooting 10923
- Troubleshooting Running EXPLAIN Renders Newlines In Python, the output of the EXPLAIN statement contains hard line breaks ( \n ): In [1]: import duckdb ...: duckdb.sql("EXPLAIN SELECT 42 AS x") Out[1]: ┌───────────────┬─────────────────────
...lays the plan as HTML itself and returns an empty string, so printing it prints nothing. Please also check out the Jupyter guide for tips on using Jupyter with JupySQL. Crashes and Errors on Windows When importing DuckDB on Windows, the Python runtime...Frames. This is needed with both native and SQLAlchemy connections. For %sqlplot boxplot , use SQLAlchemy. See the Jupyter guide for the complete setup. Ibis Fails with DuckDB 2.0 Ibis 12.0.0 fails on several operations with DuckDB 2.0, such as list_t...ables() . See the Ibis guide . DESCRIBE Returns an Empty Table in JupySQL In JupySQL, the DESCRIBE statement returns an empty table: %%sql CREATE OR RE... - https://man.mtool.work/duckdb/2.0/clients/python/known_issues.html
- Integration with PyTorch 10118
- PyTorch tensors can be built from DuckDB query results by exporting each result batch as Apache Arrow . This pattern is useful when training or serving models on Parquet data because DuckDB can filter and project the input before the batche
...dictionary with one tensor per column. To learn more about querying Arrow objects directly, see the “SQL on Apache Arrow” guide and the “Export to Apache Arrow” guide .... - https://man.mtool.work/duckdb/2.0/guides/python/pytorch.html
- SUMMARIZE Statement 9850
- The SUMMARIZE statement returns summary statistics for a table, view or a query. Usage SUMMARIZE tbl; To summarize a query, prepend SUMMARIZE to a query. SUMMARIZE SELECT * FROM tbl; See Also For more examples, see the guide on SUMMARIZE .
... - https://man.mtool.work/duckdb/2.0/sql/statements/summarize.html
- Python 9582
- The DuckDB Python package has its own repository at duckdb/duckdb-python and uses nanobind 3 to create Python bindings with DuckDB. Prerequisites This guide assumes: You have a full clone of the DuckDB Python package source, including its g
...ironment with an editable install without build isolation is possible, we don't provide guidance for that approach in this guide. We use CLion as our IDE. This guide doesn't include specific instructions for other IDEs, but the setup should be similar... - https://man.mtool.work/duckdb/2.0/dev/building/python.html
- Performance Guide 9582
- DuckDB aims to automatically achieve high performance by using well-chosen default configurations and having a forgiving architecture. Of course, there are still opportunities for tuning the system for specific workloads. The Performance Guide
...ide's pages contain guidelines and tips for achieving good performance when loading and processing data with DuckDB. The guides include several micr... - https://man.mtool.work/duckdb/2.0/guides/performance/overview.html
- DESCRIBE Statement 9582
- The DESCRIBE statement shows the schema of a table, view or query. Usage DESCRIBE tbl; To describe a query, prepend DESCRIBE to a query. DESCRIBE SELECT * FROM tbl; Alias The SHOW statement can also describe tables and queries, but this usa
...ge is deprecated as of DuckDB 2.0 and prints a warning. See Also For more examples, see the guide on DESCRIBE .... - https://man.mtool.work/duckdb/2.0/sql/statements/describe.html
- Overview 9313
- We designed DuckDB to be easy to deploy and operate. We believe that most users do not need to consult the pages of the operations manual. However, there are certain setups – e.g., when DuckDB is running in mission-critical infrastructure –
...uration snippets such as Gitignore files. For advice on getting the best performance from DuckDB, see also the Performance Guide .... - https://man.mtool.work/duckdb/2.0/operations_manual/overview.html
- Troubleshooting 9045
- This page contains solutions to common problems reported by users. If you have platform-specific issues, make sure you also consult the troubleshooting guide for your platform such as the one for Linux builds . The Build Runs Out of Memory
... - https://man.mtool.work/duckdb/2.0/dev/building/troubleshooting.html
- Guides 9045
- The guides section contains compact how-to guides that are focused on achieving a single goal. For API references and examples, see the rest of the documentation. Note that there are many tools using DuckDB, which are not covered in the off
...icial guides. To find a list of these tools, check out the Awesome DuckDB repository . Tip For a short introductory tutorial, check ou...ication Directly Reading Files How to directly read a binary file How to directly read a text file Performance Performance guide overview My workload is slow (troubleshooting guide) How to design the schema for optimal performance What is the ideal ha... - https://man.mtool.work/duckdb/2.0/guides/overview.html
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