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- Combining Schemas 11228
- 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
...those files. That is because each file has its own schema that can differ from the other files. DuckDB offers two ways of unifying schemas of multiple files: by column position and by column name . By default, DuckDB reads the schema of the first file p... - https://man.mtool.work/duckdb/2.0/data/multiple_files/combining_schemas.html
- Reading Multiple Files 7485
- DuckDB can read multiple files of different types (CSV, Parquet, JSON files) at the same time using either the glob syntax, or by providing a list of files to read. See the combining schemas page for tips on reading files with different sch
...lights2.csv : SELECT * FROM read_csv(['flights1.csv', 'flights2.csv']); Read the CSV files flights1.csv and flights2.csv , unifying schemas by name and outputting a filename column: SELECT * FROM read_csv(['flights1.csv', 'flights2.csv'], union_by_name =... - https://man.mtool.work/duckdb/2.0/data/multiple_files/overview.html
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