Database Management Systems
If you’ve ever run .help mode in the DuckDB command line interface (CLI), you may have noticed that it returns information about the .mode command, including its syntax.
You might’ve noticed that there’s a ?TABLE? part in the syntax. What’s this about? Maybe you’ve tried it out and found that it didn’t appear to do anything?
In this article, I’ll explain what the ?TABLE? part is for, and I’ll run an example to demonstrate.
DuckDB is a lightweight, fast database management system designed for analytics and embedded use cases. Its versatility makes it an excellent choice for developers and data analysts.
One useful feature of DuckDB is the ability to output query results in different formats, such as JSON, directly from the command-line interface (CLI). By default, the DuckDB CLI uses the duckbox output mode for query results (which outputs the results in a table-like format), but we can change that.
In this article, we’ll walk through the steps to output query results as JSON when using the DuckDB CLI.
Continue readingDuckDB is a fast, efficient, and embeddable SQL database designed for analytical workloads. As with any other RDBMS, a common task is listing all the tables in your DuckDB instance.
This article covers five options for displaying a list of tables in DuckDB.
Continue readingDuckDB’s command line interface (CLI) provides a convenient .mode csv command that allows you to output all query results directly in CSV format. This approach differs from the COPY statement as it affects the output format of all subsequent queries until changed.
The article takes a quick look at CSV mode in the DuckDB CLI.
Continue readingDuckDB is a database management system tailored for analytical tasks. Its command line interface (CLI) provides a convenient way to interact with databases and execute queries. The CLI provides us with the ability to configure the output mode for query results, offering flexibility in how data is displayed or exported.
This article provides a quick overview of how to change the output mode in the DuckDB CLI.
Continue readingDuckDB is a lightweight, high-performance database system designed for analytical workloads. As with any database management system (DBMS), one of the first things we normally want to do when we launch it is to create or open a database.
When it comes to creating a database, you can’t create a database in DuckDB by using the SQL CREATE DATABASE statement (unless you’re using a tool that allows you to do so). DuckDB works differently.
In this article, we look at various options for creating a database in DuckDB.
Continue readingDuckDB is a high-performance in-process analytical database management system, often referred to as the “SQLite for analytics.” Its Command Line Interface (CLI) is a useful tool for executing SQL queries, managing databases, and exploring DuckDB’s features.
This article provides a comprehensive guide to the basics of using DuckDB’s CLI, helping beginners and advanced users alike understand how to leverage it effectively.
Continue readingThis article takes a look at DuckDB, a modern database management system (DBMS) designed specifically for data analysis and processing.
Often described as the “SQLite for analytics,” DuckDB is lightweight, embeddable, and highly efficient, making it a popular choice for those working with structured data.
Whether you’re considering DuckDB for your projects or simply curious about its capabilities, this article will give you a basic overview of what it is and how it fits into the data analytics landscape.
Continue readingIf you’re getting an error that reads “AUTOINCREMENT not allowed on WITHOUT ROWID tables” in SQLite, it appears that you’re trying to define a column as an AUTOINCREMENT in a WITHOUT ROWID table.
SQLite doesn’t allow us to create AUTOINCREMENT columns on WITHOUT ROWID tables.
To address this issue, either remove the AUTOINCREMENT attribute or remove the WITHOUT ROWID from the table definition.
Despite its simplicity, SQLite includes advanced optimization techniques to ensure efficient query execution. One of the lesser-known but potentially useful features it offers is the unlikely() function, a tool designed to guide SQLite’s query planner in making better decisions.
This article looks at how the unlikely() function works in SQLite.