March 2025
Intermediate to advanced
308 pages
7h 2m
Italian
Content preview from DuckDB: installazione e avvio
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Capitolo 2. Importare i dati in DuckDB
Questo lavoro è stato tradotto utilizzando l'AI. Siamo lieti di ricevere il tuo feedback e i tuoi commenti: translation-feedback@oreilly.com
Nel Capitolo 1 hai visto come creare un semplice database DuckDB e come caricarvi delle tabelle. Nel mondo reale, i dati provengono spesso da fonti di dati e formati di file diversi, come CSV, Excel, Parquet o server di database. In questo capitolo imparerai innanzitutto i diversi modi per creare i tuoi database DuckDB e poi imparerai a caricarli utilizzando diverse fonti di dati. Alla fine del capitolo avrai un'idea chiara di come lavorare con ogni fonte di dati, oltre a suggerimenti e trucchi per gestirli.
Creare database DuckDB
In questa sezione ci addentreremo in diversi modi in cui è possibile creare i database di DuckDB e forniremo suggerimenti su quali metodi possono essere adatti ai tuoi scopi.
Il modo più semplice per creare un database DuckDB è quello di usare la funzione connect() del modulo duckdb:
importduckdbconn=duckdb.connect()
La funzione connect() restituisce un oggetto DuckDBPyConnection. Per impostazione predefinita, questa istruzione apre un database in-memory modificabile, come si vede qui:
conn=duckdb.connect(':memory:')
Se vuoi creare un database DuckDB che sia persistente sullo storage, imposta l'argomento database con il nome di un database, ad esempio mydb.duckdb (puoi usare qualsiasi estensione desideri per il nome del file):
conn=duckdb.connect(database='mydb.duckdb' ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.