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- SQL on Apache Arrow – DuckDB 13481
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...dict ({ 'i' : [ 1 , 2 , 3 , 4 ], 'j' : [ "one" , "two" , "three" , "four" ]}) # create example Parquet files and save in a folder base_path = pathlib . Path ( tempfile . gettempdir ()) ( base_path / "parquet_folder" ). mkdir ( exist_ok = True ) pq . wr...ite_to_dataset ( my_arrow_table , str ( base_path / "parquet_folder" )) # link to Parquet files using an Arrow Dataset my_arrow_dataset = ds . dataset ( str ( base_path / 'parquet_folder/' )...dict ({ 'i' : [ 1 , 2 , 3 , 4 ], 'j' : [ "one" , "two" , "three" , "four" ]}) # create example Parquet files and save in a folder base_path = pathlib . Path ( tempfile . gettempdir ()) ( base_path / "parquet_folder" ). mkdir ( exist_ok = True ) pq . wr... - https://man.mtool.work/duckdb/1.3/guides/python/sql_on_arrow.html
- Data Ingestion – DuckDB 11523
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...e. Read from a file using fully auto-detected settings: duckdb . read_csv ( "example.csv" ) Read multiple CSV files from a folder: duckdb . read_csv ( "folder/*.csv" ) Specify options on how the CSV is formatted internally: duckdb . read_csv ( "example...ithin SQL. Read from a single Parquet file: duckdb . read_parquet ( "example.parquet" ) Read multiple Parquet files from a folder: duckdb . read_parquet ( "folder/*.parquet" ) Read a Parquet file over https : duckdb . read_parquet ( "https://some.url/s...within the JSON file. Read from a single JSON file: duckdb . read_json ( "example.json" ) Read multiple JSON files from a folder: duckdb . read_json ( "folder/*.json" ) Directly read a JSON file from within SQL: duckdb . sql ( "SELECT * FROM 'example.... - https://man.mtool.work/duckdb/1.3/clients/python/data_ingestion.html
- Storage Versions and Format – DuckDB 10085
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...un the SQL statement EXPORT DATABASE 'tmp' . This allows you to save the whole state of the current database in use inside folder tmp . The content of the tmp folder will be overridden, so choose an empty/non yet existing location. Then, start the newe...r DuckDB and execute IMPORT DATABASE 'tmp' (pointing to the previously populated folder) to load the database, which can be then saved to the file you pointed DuckDB to. A Bash script to achieve this (to be ada...old format, mydata.new.db will contain the same data but in a format accessible by the more recent DuckDB version, and the folder tmp will hold the same data in a universal format as different files. Check EXPORT documentation for more details on the s... - https://man.mtool.work/duckdb/1.3/internals/storage.html
- Reading Multiple Files – DuckDB 9825
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...bining schemas page for tips on reading files with different schemas. CSV Read all files with a name ending in .csv in the folder dir : SELECT * FROM 'dir/*.csv' ; Read all files with a name ending in .csv , two directories deep: SELECT * FROM '*/*/*.c...sv' ; Read all files with a name ending in .csv , at any depth in the folder dir : SELECT * FROM 'dir/**/*.csv' ; Read the CSV files flights1.csv and flights2.csv : SELECT * FROM read_csv ([ 'flights...CT * FROM read_parquet ([ 'file1.parquet' , 'file2.parquet' , 'file3.parquet' ]); Read all Parquet files from two specific folders: SELECT * FROM read_parquet ([ 'folder1/*.parquet' , 'folder2/*.parquet' ]); Read all Parquet files that match the glob p... - https://man.mtool.work/duckdb/1.3/data/multiple_files/overview.html
- S3 Iceberg Import – DuckDB 9565
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...Iceberg table can be read from S3 using the following command: SELECT * FROM iceberg_scan ( 's3:// bucket / iceberg_table_folder /metadata/ id .metadata.json' ); Note that you need to link directly to the manifest file. Otherwise you'll get an error l...ike this: IO Error: Cannot open file "s3://bucket/iceberg_table_folder/metadata/version-hint.text": No such file or directory 関連キーワード iceberg extensions Iceberg httpfs command credential...s table metadata load installed using need After read bucket folder Documentation Guides Network Cloud Storage Copy Markdown Import Prerequisites 関連するページ S3 Parquet Export S3 Parquet... - https://man.mtool.work/duckdb/1.3/guides/network_cloud_storage/s3_iceberg_import...
- Hive Partitioning – DuckDB 8404
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...itioning strategy that is used to split a table into multiple files based on partition keys . The files are organized into folders. Within each folder, the partition key has a value that is determined by the name of the folder. Below is an example of a...ierarchy. And if so, the hive_partitioning flag is enabled automatically. The auto-detection will look at the names of the folders and search for a 'key' = 'value' pattern. This behavior can be overridden by using the hive_partitioning configuration op... - https://man.mtool.work/duckdb/1.3/data/partitioning/hive_partitioning.html
- Python – DuckDB 7884
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...uckDB Copy Markdown Python The DuckDB Python package lives in the main DuckDB source on GitHub under the /tools/pythonpkg/ folder. It uses pybind11 to create Python bindings with DuckDB. Prerequisites For everything described on this page we make the f...rsions and virtual environments. Create and activate a virtual env as follows: # Create a virtual environment in the .venv folder (in the duckdb source root) python3 -m venv --prompt duckdb .venv # Activate the virtual env source .venv/bin/activate Mak... - https://man.mtool.work/duckdb/1.3/dev/building/python.html
- Overview – DuckDB 7745
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...programmed against the SQLite C API, you can re-link to DuckDB and it should continue working. See the sqlite_api_wrapper folder in our source repository for more information. Installation The DuckDB C API can be installed as part of the libduckdb pac... - https://man.mtool.work/duckdb/1.3/clients/c/overview.html
- Partitioned Writes – DuckDB 7624
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...oned Writes When the PARTITION_BY clause is specified for the COPY statement , the files are written in a Hive partitioned folder hierarchy. The target is the name of the root directory (in the example above: orders ). The files are written in-order in... - https://man.mtool.work/duckdb/1.3/data/partitioning/partitioned_writes.html
- Extensions – DuckDB 7485
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...sm/$duckdb_version_hash/$duckdb_platform/$name.duckdb_extension.wasm . Note that an additional duckdb-wasm is added to the folder structure, and the file is served as a .wasm file. DuckDB-Wasm extensions are served pre-compressed using Brotli compressi... - https://man.mtool.work/duckdb/1.3/clients/wasm/extensions.html
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