Passing SQLite variables in Python

SQLite is a lightweight and widely used relational database management system that can be seamlessly integrated with Python. Passing variables to SQLite queries allows you to create dynamic, data-driven applications. In this tutorial, we'll walk through the process of passing variables to SQLite queries in Python using the sqlite3 library.
Python: Make sure you have Python installed on your system. You can download Python from python.org.
SQLite: SQLite is included with Python by default, so no additional installation is necessary.
sqlite3 Library: This library is part of the Python Standard Library, so no separate installation is required.
Before we begin, let's create a simple SQLite database and a table to work with.
In this code snippet, we connect to a database named my_database.db (it will be created if it doesn't exist), create a table named users, and define its structure with three columns: id, name, and age.
Now, let's see how to pass variables into SQL statements using placeholders. SQLite uses ? as the placeholder for values you want to insert or retrieve.
In this example, we create variables name and age and use placeholders in the SQL statement to insert these values into the users table.
In this code, we use a placeholder to filter the users table and retrieve data based on the value of user_id.
Passing variables in SQLite queries in Python is essential for creating dynamic, data-driven applications. By using placeholders, you can insert and retrieve data from the database efficiently and securely. This tutorial covered the basics, but you can expand on this knowledge to build more complex and interactive database applications.
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