My SQL Database What is My SQL My

My. SQL Database

What is My. SQL? My. SQL is a database system used on the web My. SQL is a database system that runs on a server My. SQL is ideal for both small and large applications My. SQL is very fast, reliable, and easy to use My. SQL uses standard SQL My. SQL compiles on a number of platforms My. SQL is free to download and use My. SQL is developed, distributed, and supported by Oracle Corporation My. SQL is named after co-founder Monty Widenius's daughter: My he data in a My. SQL database are stored in tables. A table is a collection of related data, and it consists of columns and rows. Databases are useful for storing information categorically. A company may have a database with the following tables: Employees Products Customers Orders

PHP Connection <? php $servername = "localhost"; $username = “root"; $password = "password"; // Create connection $conn = new mysqli($servername, $username, $password); // Check connection if ($conn->connect_error) { die("Connection failed: ". $conn->connect_error); } echo "Connected successfully"; ? >

Example (My. SQLi Procedural) <? php $servername = "localhost"; $username = "username"; $password = "password"; // Create connection $conn = mysqli_connect($servername, $username, $password); // Check connection if (!$conn) { die("Connection failed: ". mysqli_connect_error()); } echo "Connected successfully"; ? >

Create database $sql = "CREATE DATABASE my. DB"; if ($conn->query($sql) === TRUE) { echo "Database created successfully"; } else { echo "Error creating database: ". $conn->error; }

Procedural <? php $servername = "localhost"; $username = "username"; $password = "password"; // Create connection $conn = mysqli_connect($servername, $username, $password); // Check connection if (!$conn) { die("Connection failed: ". mysqli_connect_error()); } echo "Connected successfully"; ? >

sql to create table $sql = "CREATE TABLE My. Guests ( id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, email VARCHAR(50), )"; if ($conn->query($sql) === TRUE) { echo "Table My. Guests created successfully"; } else { echo "Error creating table: ". $conn->error; }

Insert Data in My. SQL Database

Example (My. SQLi Object-oriented) <? php $servername = "localhost"; $username = "username"; $password = "password"; $dbname = "my. DB"; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die("Connection failed: ". $conn->connect_error); } $sql = "INSERT INTO My. Guests (firstname, lastname, email) VALUES ('John', 'Doe', 'john@example. com')"; if ($conn->query($sql) === TRUE) { echo "New record created successfully"; } else { echo "Error: ". $sql. " ". $conn->error; } $conn->close(); ? >

Example (My. SQLi Procedural) <? php $servername = "localhost"; $username = "username"; $password = "password"; $dbname = "my. DB"; // Create connection $conn = mysqli_connect($servername, $username, $password, $dbname); // Check connection if (!$conn) { die("Connection failed: ". mysqli_connect_error()); } $sql = "INSERT INTO My. Guests (firstname, lastname, email) VALUES ('John', 'Doe', 'john@example. com')"; if (mysqli_query($conn, $sql)) { echo "New record created successfully"; } else { echo "Error: ". $sql. " ". mysqli_error($conn); } mysqli_close($conn); ? >

Insert Multiple Records Into My. SQL Using My. SQLi $sql = "INSERT INTO My. Guests (firstname, lastname, email) VALUES ('John', 'Doe', 'john@example. com'); "; $sql. = "INSERT INTO My. Guests (firstname, lastname, email) VALUES ('Mary', 'Moe', 'mary@example. com'); "; $sql. = "INSERT INTO My. Guests (firstname, lastname, email) VALUES ('Julie', 'Dooley', 'julie@example. com')"; if ($conn->multi_query($sql) === TRUE) { echo "New records created successfully"; } else { echo "Error: ". $sql. " ". $conn->error; } $conn->close(); ? >

Select Data From a My. SQL Database

$sql = "SELECT id, firstname, lastname FROM My. Guests"; $result = $conn->query($sql); if ($result->num_rows > 0) { // output data of each row while($row = $result->fetch_assoc()) { echo "id: ". $row["id"]. " - Name: ". $row["firstname"]. " ". $row["lastname"]. " "; } } else { echo "0 results"; } $conn->close(); ? >

In Table $sql = "SELECT id, firstname, lastname FROM My. Guests"; $result = $conn->query($sql); if ($result->num_rows > 0) { echo "<table><tr><th>ID</th><th>Name</th></tr>"; // output data of each row while($row = $result->fetch_assoc()) { echo "<tr><td>". $row["id"]. "</td><td>". $row["firstname"]. " ". $row["lastname"]. "</td></tr>"; } echo "</table>"; } else { echo "0 results"; } $conn->close(); ? >