Database Connection with Python using MySQL

Author: PatilNi3

mysql.ipynb

@@ -0,0 +1,190 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Database Connection with Python using MySQL"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "A database connection is essential for allowing your application (such as a Python program) to interact with a database. Without a connection, your program wouldn't be able to read, write, or manipulate data stored in the database. Here are some of the key reasons why a database connection is needed:\n",
+    "\n",
+    "1. Data Storage and Retrieval\n",
+    "2. Enabling SQL Queries\n",
+    "3. Transaction Management\n",
+    "4. Concurrency and Multi-user Access\n",
+    "5. Security and Authentication\n",
+    "6. Efficiency and Performance\n",
+    "7. Data Integrity and Consistency\n",
+    "8. Communication Between Application and Database\n",
+    "9. Managing Complex Queries and Relationships\n",
+    "10. External Applications and APIs"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### How to do Database Connection\n",
+    "\n",
+    "To connect to a database using Python, you'll need to use a database connector or driver specific to the type of database you're working with (e.g., SQLite, MySQL, PostgreSQL).\n",
+    "\n",
+    "**1. Import required library:** You'll need to install a MySQL driver like mysql-connector-python or PyMySQL."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "!pip install mysql-connector-python\n",
+    "import mysql.connector"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**2. Establish the connection to MySQL Database:** "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "connect = mysql.connector.connect(\n",
+    "    host='localhost',\n",
+    "    user='your_username',\n",
+    "    password='your_password',\n",
+    "    database='your_database'\n",
+    ")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**3. Create Cursor Object using the connection:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cursor = connect.cursor()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**4. Create Table:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cursor.execute('''CREATE TABLE IF NOT EXISTS users (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(100))''')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**5. Insert Data:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cursor.execute(\"INSERT INTO users (name) VALUES ('nitin')\")\n",
+    "cursor.execute(\"INSERT INTO users (name) VALUES ('rucha')\")\n",
+    "cursor.execute(\"INSERT INTO users (name) VALUES ('neha')\")\n",
+    "cursor.execute(\"INSERT INTO users (name) VALUES ('timish')\")\n",
+    "cursor.execute(\"INSERT INTO users (name) VALUES ('amol')\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**6. Commit the Changes:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "connect.commit()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**7. Retrieve Data:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cursor.execute(\"SELECT * FROM users\")\n",
+    "\n",
+    "rows = cursor.fetchall\n",
+    "\n",
+    "for row in rows:\n",
+    "    print(row)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**8. Close the connection:**"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "cursor.close()\n",
+    "connect.close()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "database_connection",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "name": "python",
+   "version": "3.12.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}