MySQL CREATE is used to create Database and its Tables.
Create a Database
CREATE DATABASE statement is used to create a database in MySQL.
We have to add the CREATE DATABASE statement to the mysqli_query() function to execute the command.
Example:
<?php
// Database connection establishment
$con=mysqli_connect("example.com","alex","qwerty");
// Check connection
if (mysqli_connect_errno($con)) {
echo "MySQL database connection failed: " . mysqli_connect_error();
}
// Create database
if (mysqli_query($con,"CREATE DATABASE my_database")) {
echo "Database created successfully";
}else {
echo "Error in creating database: " . mysqli_error($con);
}
?> Create a Table in Database
CREATE TABLE statement is used to create a table in MySQL database.
We have to add the CREATE TABLE statement to the mysqli_query() function to execute the command.
Example:
<?php
// Database connection establishment
$con=mysqli_connect("example.com","alex","qwerty","my_database");
// Check connection
if (mysqli_connect_errno($con)) {
echo "MySQL database connection failed: " . mysqli_connect_error();
}
// Create table query
$query = "CREATE TABLE users(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
name VARCHAR( 25 ) NOT NULL ,
last_name VARCHAR( 25 ) NOT NULL ,
age INT NOT NULL
)";
// Execute query
if (mysqli_query($con,$query)) {
echo "Table created successfully";
}else {
echo "Error in creating table: " . mysqli_error($con);
}
?> - You must select the database before creating tables in the database.
- To create tables in the database, the data type and maximum length of the field should be defined , e.g. varchar(20).
- Each table should have a primary key field, a primary key is unique and key value can not occur twice in one table.