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TPC-DS Extension 12174
New In DuckDB 2.0, the dsdgen data generator was updated to match the TPC-DS version 4 tools. As a result, the generated data differs slightly from the data generated by DuckDB v1.x. See the related PR for more details. The tpcds extension ...
https://man.mtool.work/duckdb/2.0/core_extensions/tpcds.html
Combining Schemas 9742
Examples Read a set of CSV files combining columns by position: SELECT * FROM read_csv('flights*.csv'); Read a set of CSV files combining columns by name: SELECT * FROM read_csv('flights*.csv', union_by_name = true); Combining Schemas When ... om a later file cause an error. This works correctly as long as all files have the same schema. If the schema of the files differs, you might want to use the union_by_name option to allow DuckDB to construct the schema by reading all of the names instea ...
https://man.mtool.work/duckdb/2.0/data/multiple_files/combining_schemas.html
Variant Type 9742
The VARIANT type stores typed, binary data where each row is self-contained with its own type information. This differs from the JSON type , which is physically stored as text. Because type metadata is embedded per-value, VARIANT provides b ...
https://man.mtool.work/duckdb/2.0/sql/data_types/variant.html
DuckDB Wasm Client 8518
Installation To use the DuckDB Wasm client, visit the duckdb-wasm GitHub repository . The latest stable version of the DuckDB WebAssembly client is 2.0.0. DuckDB-Wasm is a version of DuckDB that has been compiled to WebAssembly , the portab ... — materialized and streaming queries, prepared statements, and exporting results. Load Extensions — how extension loading differs from native DuckDB and which extensions are available. Deploy — the components a deployment serves and the security consid ...
https://man.mtool.work/duckdb/2.0/clients/wasm/overview.html
MERGE INTO Statement 8518
The MERGE INTO statement is an alternative to INSERT INTO ... ON CONFLICT that doesn't need a primary key since it allows for a custom match condition. This is a very useful alternative for upserting use cases ( INSERT + UPDATE ) when the d ... or the ON condition is unique. To avoid this, deduplicate the source rows or make the ON condition unique. Note that this differs from UPDATE ... FROM , which uses an arbitrary matching source row. Syntax ...
https://man.mtool.work/duckdb/2.0/sql/statements/merge_into.html
INSERT Statement 6087
The INSERT statement inserts new data into a table. Examples Insert the values 1, 2, 3 into tbl : INSERT INTO tbl VALUES (1), (2), (3); Insert the result of a query into a table: INSERT INTO tbl SELECT * FROM other_tbl; Insert values into t ... t values should be inserted into the table. This allows inserting even in cases when the order of the columns in the table differs from the order of the values in the SELECT statement or certain columns are missing. For example: CREATE TABLE tbl (a INTE ...
https://man.mtool.work/duckdb/2.0/sql/statements/insert.html
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