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- Python Client API – DuckDB 17213
- This page is for DuckDB 1.3, which is outdated.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
...eate a relation object for the named view class duckdb. DuckDBPyRelation ¶ Bases: pybind11_object Detailed examples can be found at Relational API page . aggregate ( self : duckdb.duckdb.DuckDBPyRelation , aggr_expr : object , group_expr : str = '' )...kDBPyRelation ¶ Compute the aggregate aggr_expr by the optional groups group_expr on the relation Detailed examples can be found at Relational API page . alias ¶ Get the name of the current alias Detailed examples can be found at Relational API page ....tr = '' ) → duckdb.duckdb.DuckDBPyRelation ¶ Returns the first non-null value from a given column Detailed examples can be found at Relational API page . apply ( self : duckdb.duckdb.DuckDBPyRelation , function_name : str , function_aggr : str , group... - https://man.mtool.work/duckdb/1.3/clients/python/reference/
- Python – DuckDB 8708
- This page is for DuckDB 1.3, which is outdated.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
...y wrap the call in py::reinterpret_steal to take ownership of the returned object. Troubleshooting Pip Fails with No names found, cannot describe anything If you've forked DuckDB you may run into trouble when building the Python package when you haven...Extension Fails The build fails on OSX when both the httpfs extension and the Python package are included: ld: library not found for -lcrypto clang: error: linker command failed with exit code 1 (use -v to see invocation) error: command '/usr/bin/clan...g in the httpfs extension is problematic. Please install it at runtime, if you can. Importing DuckDB Fails with symbol not found in flat namespace If you seen an error that looks like this: ImportError: dlopen(/usr/bin/python3/site-packages/duckdb/duc... - https://man.mtool.work/duckdb/1.3/dev/building/python.html
- Excel Extension – DuckDB 8363
- This page is for DuckDB 1.3, which is outdated.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
...on the first "data" row in the sheet, that is: If no explicit range is given The first row after the header if a header is found or forced by the header option The first non-empty row in the sheet if no header is found or forced If an explicit range i...s given The second row of the range if a header is found in the first row or forced by the header option The first row of the range if no header is found or forced This can someti...g JSON See this page as Markdown Edit this page on GitHub Report content issue See this repository on GitHub © 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Installing and Loading Excel Scalar Func... - https://man.mtool.work/duckdb/1.3/core_extensions/excel.html
- EXPORT and IMPORT DATABASE Statements – DuckDB 8363
- 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
...load.sql target_directory/t_1.csv ... target_directory/t_n.csv The schema.sql file contains the schema statements that are found in the database. It contains any CREATE SCHEMA , CREATE TABLE , CREATE VIEW and CREATE SEQUENCE commands that are necessar...ents that can be used to read the data from the CSV files again. The file contains a single COPY statement for every table found in the schema. Syntax IMPORT DATABASE The database can be reloaded by using the IMPORT DATABASE command again, or manually...and Export Parquet load contains contents files tables Statements allows specific read using serialized parquet statements found Syntax Documentation Copy 関連するページ USE Statement List Tables CREATE SCHEMA Statement Files Created by DuckDB Parquet... - https://man.mtool.work/duckdb/1.3/sql/statements/export.html
- Text Functions – DuckDB 8301
- 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
...trings, separated by separator . NULL inputs are skipped. contains(string, search_string) Returns true if search_string is found within string . Note that collations are not supported. ends_with(string, search_string) Returns true if string ends with...g, search_string) Returns location of first occurrence of search_string in string , counting from 1. Returns 0 if no match found. lcase(string) Converts string to lower case. least(arg1, ...) Returns the smallest value in lexicographical order. Note t..._string IN string) Return location of first occurrence of search_string in string , counting from 1. Returns 0 if no match found. prefix(string, search_string) Returns true if string starts with search_string . printf(format, ...) Formats a string usi... - https://man.mtool.work/duckdb/1.3/sql/functions/text.html
- UI Extension – DuckDB 8175
- 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
...nterface for your local DuckDB instance. The UI is built and maintained by MotherDuck . An overview of its features can be found in the MotherDuck documentation . Requirements An environment with a browser. Any DuckDB client except Wasm, v1.2.1 or lat...-readonly read_only_test.db In the UI, this results in: Catalog Error: SET schema: No catalog + schema named "memory.main" found. To work around this, run the UI on another database file: duckdb -ui ui_catalog.db Then, open a notebook and attach to th...nt default port remote polling instance browser command like interval available stop variable also used database extension found client 関連するページ UPDATE EXTENSIONS DuckDB Repositories Advanced Installation Methods CLI Client DuckDB Environment Ex... - https://man.mtool.work/duckdb/1.3/core_extensions/ui.html
- macOS – DuckDB 8175
- 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
...debug , relassert , etc.), please consult the Build Configurations page . Troubleshooting Build Failure: 'string' file not found Problem: The build fails on macOS with following error: FAILED: third_party/libpg_query/CMakeFiles/duckdb_pg_query.dir/src...p:35: /Users/builder/external/duckdb/third_party/libpg_query/include/pg_functions.hpp:4:10: fatal error: 'string' file not found 4 | #include <string> Solution: Users report that reinstalling Xcode fixed their problem. See related discussions on the D...ws Building DuckDB from Source Linux See this page as Markdown Edit this page on GitHub Report content issue © 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Prerequisites Building DuckDB Troublesho... - https://man.mtool.work/duckdb/1.3/dev/building/macos.html
- Expressions – DuckDB 8034
- 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
...operators and functions. Expressions are highly composable, and range from very simple to arbitrarily complex. They can be found in many different parts of SQL statements. In this section, we provide the different types of operators and functions that...tions different Documentation Copy Markdown expression combination values highly composable range arbitrarily complex They found many parts statements section provide types used within 関連するページ Logical Operators Comparisons TRY expression Nested...ons Tuning Workloads Star Expression See this page as Markdown Edit this page on GitHub Report content issue © 2026 DuckDB Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog... - https://man.mtool.work/duckdb/1.3/sql/expressions/overview.html
- Java JDBC Client – DuckDB 7893
- This page is for DuckDB 1.3, which is outdated. Switch to the current documentation . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Ove
...INSERT INTO test (x, y, z) VALUES (4, 5, 6);" ); stmt . executeBatch (); stmt . close (); Troubleshooting Driver Class Not Found If the Java application is unable to find the DuckDB, it may throw the following error: Exception in thread "main" java.sq...l.SQLException: No suitable driver found for jdbc:duckdb: at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:706) at java.sql/java.sql.DriverManag...... And when trying to load the class manually, it may result in this error: Exception in thread "main" java.lang.ClassNotFoundException: org.duckdb.DuckDBDriver at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:64... - https://man.mtool.work/duckdb/1.3/clients/java.html
- SQL Introduction – DuckDB 7768
- 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
...000 San Francisco 43 57 0.0 1994-11-29 53.000 -194.000 Since the columns all had different names, the parser automatically found which table they belong to. If there were duplicate column names in the two tables you'd need to qualify the column names...nt the query to do is to scan the weather table and for each row to find the matching cities row(s). If no matching row is found we want some “empty values” to be substituted for the cities table's columns. This kind of query is called an outer join....er WHERE city LIKE 'S%' -- (1) GROUP BY city HAVING max ( temp_lo ) < 40 ; More information about the LIKE operator can be found in the pattern matching page . It is important to understand the interaction between aggregates and SQL's WHERE and HAVING... - https://man.mtool.work/duckdb/1.3/sql/introduction.html
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