Python SQLite Tutorial: Fetching selected Records to a Database | Python in Tamil
SQLite is a software library that provides a relational database management system (RDBMS) implemented as a serverless, zero-configuration, and self-contained database engine. It is embedded within the application that uses it and does not require a separate server process.
In SQLite, the entire database resides in a single file, which makes it highly portable and easy to manage. This file, often with a .sqlite or .db extension, contains all the tables, indexes, queries, and other database objects. It can be stored anywhere on the file system accessible to the application.
When working with SQLite, you typically interact with the database through SQL commands. Here are some key concepts related to SQLite:
1. Tables: Data in SQLite is organized into tables, which consist of rows and columns. Each column has a data type, such as integer, text, real, or blob.
2. Schema: The structure of a database, including tables, columns, constraints, and indexes, is defined by a schema. You can create, modify, and drop tables using SQL commands.
3. Queries: SQLite supports a subset of SQL for querying and manipulating data. You can retrieve data using SELECT statements, modify data with UPDATE, INSERT, and DELETE statements, and perform various operations like joins, filtering, and aggregations.
4. Indexes: Indexes improve the performance of queries by creating data structures that allow for faster data retrieval. You can create indexes on one or more columns of a table to speed up searching and sorting operations.
5. Transactions: SQLite supports transactions to ensure data integrity. You can group multiple database operations into a transaction, which guarantees that either all operations are completed successfully or none of them are applied.
6. Views: Views provide virtual tables based on the result of a query. They can simplify complex queries, abstract the underlying table structure, and provide an additional layer of security by controlling access to the data.
SQLite can be used in various programming languages and platforms, including C/C++, Python, Java, and many more. You typically interact with SQLite using a language-specific SQLite library or an Object-Relational Mapping (ORM) framework that abstracts the database operations.
Overall, SQLite is a lightweight, serverless, and self-contained database engine that offers a simple and efficient way to store, retrieve, and manage structured data within your application.