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Hajipur, Bihar, 844101
MySQL
Introduction to MySQL
MySQL SQL Basics
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MySQL SQL
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MySQL SELECT
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MySQL WHERE
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MySQL AND, OR, NOT
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MySQL ORDER BY
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MySQL INSERT INTO
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MySQL NULL Values
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MySQL UPDATE
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MySQL DELETE
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MySQL LIMIT
MySQL Functions & Operators
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MySQL MIN and MAX
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MySQL COUNT, AVG, SUM
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MySQL LIKE
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MySQL Wildcards
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MySQL IN
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MySQL BETWEEN
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MySQL Aliases
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MySQL CASE
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MySQL EXISTS
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MySQL ANY, ALL
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MySQL Null Functions
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MySQL Comments
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MySQL Operators
MySQL Joins & Unions
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MySQL Joins
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MySQL INNER JOIN
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MySQL LEFT JOIN
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MySQL RIGHT JOIN
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MySQL CROSS JOIN
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MySQL Self Join
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MySQL UNION
MySQL Grouping & Filtering
Database & Table Management
MySQL Constraints
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MySQL Constraints
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MySQL Not Null
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MySQL Unique
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MySQL Primary Key
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MySQL Foreign Key
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MySQL Check
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MySQL Default
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MySQL Create Index
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MySQL Auto Increment
Date & Views
References
MySQL Introduction
🔹 What is MySQL?
MySQL is an open-source relational database management system (RDBMS). It is used to store, manage, and retrieve data for web applications and enterprise software.
MySQL is developed, distributed, and supported by Oracle Corporation and is one of the most popular databases used with PHP, Java, and Python.
🔹 Why Use MySQL?
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Open-source and free to use
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Fast, reliable, and scalable
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Supports large databases and complex queries
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Integrates well with PHP and web servers
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Powerful SQL language support for querying and managing data
🔹 What is SQL?
SQL (Structured Query Language) is the standard language used to communicate with MySQL databases. SQL allows you to:
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Create and modify database structures (tables, columns)
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Insert, update, delete, and query data
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Manage users, permissions, and transactions
🔹 Basic MySQL Syntax Example
SELECT * FROM customers;This command retrieves all records from the customers table.
🔹 Common SQL Commands in MySQL
| Command | Description |
|---|---|
SELECT |
Retrieve data from a table |
INSERT INTO |
Add new data into a table |
UPDATE |
Modify existing data |
DELETE |
Remove records |
CREATE TABLE |
Define a new table |
ALTER TABLE |
Modify table structure |
DROP TABLE |
Delete a table |
🔹 Connecting MySQL with PHP
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully";
?>
Practice Questions
Q1. Create a table for storing student records
Q2. Insert a record into the students table
Q3. Retrieve all records from the students table
Q4. Update a student's grade
Q5. Delete a student from the table
MySQL
Introduction to MySQL
MySQL SQL Basics
-
MySQL SQL
-
MySQL SELECT
-
MySQL WHERE
-
MySQL AND, OR, NOT
-
MySQL ORDER BY
-
MySQL INSERT INTO
-
MySQL NULL Values
-
MySQL UPDATE
-
MySQL DELETE
-
MySQL LIMIT
MySQL Functions & Operators
-
MySQL MIN and MAX
-
MySQL COUNT, AVG, SUM
-
MySQL LIKE
-
MySQL Wildcards
-
MySQL IN
-
MySQL BETWEEN
-
MySQL Aliases
-
MySQL CASE
-
MySQL EXISTS
-
MySQL ANY, ALL
-
MySQL Null Functions
-
MySQL Comments
-
MySQL Operators
MySQL Joins & Unions
-
MySQL Joins
-
MySQL INNER JOIN
-
MySQL LEFT JOIN
-
MySQL RIGHT JOIN
-
MySQL CROSS JOIN
-
MySQL Self Join
-
MySQL UNION
MySQL Grouping & Filtering
Database & Table Management
MySQL Constraints
-
MySQL Constraints
-
MySQL Not Null
-
MySQL Unique
-
MySQL Primary Key
-
MySQL Foreign Key
-
MySQL Check
-
MySQL Default
-
MySQL Create Index
-
MySQL Auto Increment
Date & Views
References
