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Constraints – DuckDB 12445: This page is for DuckDB 1.3, which is outdated.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 ... umn cannot contain any NULL values. By default, all columns in tables are nullable. Adding NOT NULL to a column definition enforces that a column cannot contain NULL values. CREATE TABLE students ( name VARCHAR NOT NULL ); INSERT INTO students VALUES ( N ... unique constraints define a column, or set of columns, that are a unique identifier for a row in the table. The constraint enforces that the specified columns are unique within a table, i.e., that at most one row contains the given values for the set of ... oints: A table can only have one primary key constraint defined, but many unique constraints A primary key constraint also enforces the keys to not be NULL . CREATE TABLE students ( id INTEGER PRIMARY KEY , name VARCHAR , email VARCHAR UNIQUE ); INSERT I ...; https://man.mtool.work/duckdb/1.3/sql/constraints.html

SQLite Extension – DuckDB 8284: This page is for DuckDB 1.3, which is outdated.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 ... g TIME , then it is translated into TIMESTAMP . If none of the above apply, then it is translated into VARCHAR . As DuckDB enforces the corresponding columns to contain only correctly typed values, we cannot load the string “hello” into a column of type ...; https://man.mtool.work/duckdb/1.3/core_extensions/sqlite.html

CSV Import – DuckDB 8118: This page is for DuckDB 1.3, which is outdated.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 ... f each file. BIGINT 0 store_rejects Skip any lines with errors and store them in the rejects table. BOOL false strict_mode Enforces the strictness level of the CSV Reader. When set to true , the parser will throw an error upon encountering any issues. Wh ...; https://man.mtool.work/duckdb/1.3/data/csv/overview.html

Struct Data Type – DuckDB 8118: This page is for DuckDB 1.3, which is outdated.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 ... s allows DuckDB to provide significantly improved performance by fully utilizing its vectorized execution engine, and also enforces type consistency for improved correctness. DuckDB includes a row function as a special way to produce a STRUCT , but does ...; https://man.mtool.work/duckdb/1.3/sql/data_types/struct.html

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