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- ALTER TABLE Statement – DuckDB 14212
- This page is for DuckDB 1.3, which is outdated.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
...Examples CREATE TABLE integers ( i INTEGER , j INTEGER ); Add a new column with name k to the table integers , it will be filled with the default value NULL : ALTER TABLE integers ADD COLUMN k INTEGER ; Add a new column with name l to the table intege...rs, it will be filled with the default value 10: ALTER TABLE integers ADD COLUMN l INTEGER DEFAULT 10 ; Drop the column k from the table integer...mn of a table, use the ADD or ADD COLUMN clauses. E.g., to add a new column with name k to the table integers , it will be filled with the default value NULL : ALTER TABLE integers ADD COLUMN k INTEGER ; Or: ALTER TABLE integers ADD k INTEGER ; Add a n... - https://man.mtool.work/duckdb/1.3/sql/statements/alter_table.html
- INSERT Statement – DuckDB 8867
- This page is for DuckDB 1.3, which is outdated.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
...n either be BY POSITION (the default) or BY NAME . Each column not present in the explicit or implicit column list will be filled with a default value, either its declared default value or NULL if there is none. If the expression for any column is not...misspelled or does not exist in the table, an error will occur. Columns that are missing from the SELECT statement will be filled with the default value. ON CONFLICT Clause An ON CONFLICT clause can be used to perform a certain action on conflicts that... - https://man.mtool.work/duckdb/1.3/sql/statements/insert.html
- Appender – DuckDB 8634
- This page is for DuckDB 1.3, which is outdated.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
...us data. The active column list specifies all columns that are expected when flushing the data. Any non-active columns are filled with their default values, or NULL. Syntax duckdb_state duckdb_appender_add_column ( duckdb_appender appender , const char...duckdb_state duckdb_append_value ( duckdb_appender appender , duckdb_value value ); duckdb_append_data_chunk Appends a pre-filled data chunk to the specified appender. Attempts casting, if the data chunk types do not match the active appender types. Sy... - https://man.mtool.work/duckdb/1.3/clients/c/appender.html
- COPY Statement – DuckDB 8634
- 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
...ntents of a comma-separated file names.csv into the name column of the category table. Any other columns of this table are filled with their default value: COPY category ( name ) FROM 'names.csv' ; Read the contents of a Parquet file lineitem.parquet i...L false FILENAME_PATTERN Set a pattern to use for the filename, can optionally contain {uuid} / {uuidv4} or {uuidv7} to be filled in with a generated UUID (v4 or v7, respectively), and {i} , which is replaced by an incrementing index. Only has an effec... - https://man.mtool.work/duckdb/1.3/sql/statements/copy.html
- CSV Import Tips – DuckDB 8402
- 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
...fy the schema of files that have different or missing columns. For files that do not have certain columns, NULL values are filled in. SELECT * FROM read_csv ( 'flights*.csv' , union_by_name = true ); To load data into an existing table where the table... - https://man.mtool.work/duckdb/1.3/data/csv/tips.html
- Parquet Tips – DuckDB 8402
- 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
...fy the schema of files that have different or missing columns. For files that do not have certain columns, NULL values are filled in: SELECT * FROM read_parquet ( 'flights*.parquet' , union_by_name = true ); Tips for Writing Parquet Files Using a glob... - https://man.mtool.work/duckdb/1.3/data/parquet/tips.html
- Configuration – DuckDB 8170
- 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
...any of these settings can be changed later on using PRAGMA statements as well. The configuration object should be created, filled with values and passed to duckdb_open_ext . Example duckdb_database db ; duckdb_config config ; // create the configuratio... - https://man.mtool.work/duckdb/1.3/clients/c/config.html
- Data Chunks – DuckDB 8170
- 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
...d individual values. Writing Data : Data chunks can be created using duckdb_create_data_chunk . The data chunk can then be filled with values and used in duckdb_append_data_chunk to write data to the database. The primary manner of interfacing with dat... - https://man.mtool.work/duckdb/1.3/clients/c/data_chunk.html
- Set Operations – DuckDB 8170
- 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
...oes not require both queries to have the same number of columns. Any columns that are only found in one of the queries are filled with NULL values for the other query. Take the following tables for example: CREATE TABLE capitals ( city VARCHAR , countr... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/setops.html
- DuckDB_% Metadata Functions – DuckDB 7705
- 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
...tions available in the CREATE SEQUENCE statement and are documented there in full. Note that the attributes will always be filled out in the duckdb_sequences resultset, even if they were not explicitly specified in the CREATE SEQUENCE statement. The co... - https://man.mtool.work/duckdb/1.3/sql/meta/duckdb_table_functions.html
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