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SQLite
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SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. It is embedded directly into the application, eliminating the need for a separate server process or system dependencies. SQLite is widely used in various applications, including mobile apps, embedded systems, desktop software, and even web browsers.
Key Features
* **Serverless Architecture:** SQLite operates directly within the application, eliminating the need for a separate database server.
* **Self-Contained:** The entire database is contained within a single file, making it easy to manage and distribute.
* **High Reliability:** SQLite is known for its exceptional reliability and robustness, with features like atomic commits and rollback to ensure data integrity.
* **Full-Featured SQL Support:** It supports most of the SQL standard, including transactions, views, triggers, and user-defined functions.
* **Cross-Platform Compatibility:** SQLite is available on a wide range of platforms, including Linux, macOS, Windows, and various mobile operating systems.
* **Zero-Configuration:** SQLite requires no configuration or setup, making it easy to integrate into applications.
Benefits
* **Simplicity and Ease of Use:** Its serverless architecture and self-contained nature simplify deployment and management.
* **Portability:** SQLite's cross-platform compatibility makes it suitable for applications that need to run on various operating systems.
* **High Performance:** Its optimized design and efficient implementation lead to fast and responsive database operations.
* **Reliability:** SQLite's strong focus on data integrity and ACID compliance ensures the reliability of your data.
* **Zero-Configuration:** It eliminates the need for complex database setup and administration.
Code Examples
1. **Creating a Database and Table (C):**
```c
#include
#include
int main() {
sqlite3 *db;
char *err_msg = 0;
int rc = sqlite3_open("my_database.db", &db);
if (rc != SQLITE_OK) {
fprintf(stderr, "Cannot open database: %s\n", sqlite3_errmsg(db));
sqlite3_close(db);
return 1;
}
char *sql = "CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, age INTEGER);";
rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err_msg);
sqlite3_free(err_msg);
sqlite3_close(db);
return 1;
}
sqlite3_close(db);
return 0;
}
```
2. **Inserting Data (Python):**
```python
import sqlite3
conn = sqlite3.connect('my_database.db')
cursor = conn.cursor()
cursor.execute("INSERT INTO users (name, age) VALUES (?, ?)", ("Alice", 30))
conn.commit()
conn.close()
```
3. **Querying Data (Python):**
```python
import sqlite3
conn = sqlite3.connect('my_database.db')
cursor = conn.cursor()
cursor.execute("SELECT * FROM users")
rows = cursor.fetchall()
for row in rows:
print(row)
conn.close()
```
Additional Resources
* **SQLite Official Website:** [https://www.sqlite.org/](https://www.sqlite.org/)
* **SQLite Documentation:** [https://www.sqlite.org/docs.html](https://www.sqlite.org/docs.html)
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