WebJul 27, 2024 · 1 Suppose I use DuckDB with python, for querying an Apache parquet file test.pq with a table containing two columns f1 and f2. r1 = duckdb.query (""" SELECT f1 FROM parquet_scan ('test.pq') WHERE f2 > 1 """) Now I would like to use r1 result in another query, like: duckdb.query ("""SELECT * FROM r1 WHERE f1 > 10""") Webconn = duckdb.connect() If you want to persist the data, you can create a database file with: conn = duckdb.connect (database='db.duckdb', read_only=False) Notice the …
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WebDec 1, 2024 · DuckDB provides out of box experience for you to connect with a database or create a new one with a similar command duckdb.connect(,read_only=False). As you … WebRead a Feather file (an Arrow IPC file) read_ipc_stream () Read Arrow IPC stream format read_parquet () Read a Parquet file read_delim_arrow () read_csv_arrow () read_tsv_arrow () Read a CSV or other delimited file with Arrow read_json_arrow () Read a JSON file write_feather () write_ipc_file () Write a Feather file (an Arrow IPC file) netflix long tail strategy
How to update multiple parquet files with DuckDB
WebOct 28, 2024 · Regarding performance, parquet is 717 times faster than the same query on a csv file, and duckdb is 2808 times faster. DuckDB is 4 times faster than the query on a parquet file. Keep in mind that there is a … WebJan 4, 2024 · feather with "zstd" compression (for I/O speed): compared to csv, feather exporting has 20x faster exporting and about 6x times faster importing. The storage is around 32% from the original file size, which is 10% worse than parquet "gzip" and csv zipped but still decent. WebA CLI that predictively lists possible words and then gets a definition of the input. To use download dictionary.db from Kaggle. PRs welcome. itunes changed to music