How to create database in Yii2 format - yii2

Question

I want create database with yii2.
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = new mysqli($servername, $username, $password);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// Create database
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
echo "Database created successfully";
} else {
echo "Error creating database: " . $conn->error;
}
$conn->close();
With this code we can create DB but i want to know whether it is possible in Yii2 manner

Answer 1

Currently there is no way you can do it with Yii2. It is because too much complexity for a framework to have everything works on many database engines (MySQL, Oracle, MSSQL, etc). Too many efforts to code, yet the functionality can be done using your query.
IMO, there is nothing wrong with creating a database using current db connection. This can be found in SaaS multi-tenant architecture, when a new client registers an account, then a new separated DB created to encapsulate mostly everything / security reason.

Answer 2

It's not recommended to create tables at run-time. Already set-up the schema and run your SQL / non-SQL query.
For this, you need to create a file (say myDB.php) in your config folder and provide database details as follows :
<?php
return [
'class' => 'yii\db\Connection',
'dsn' => 'dblib:host=localhost;dbname=yourDBName',
'username' => 'yourUsername',
'password' => 'yourPassword',
'charset' => 'utf8',
];
Register this database in your web.php.Add following line :
'my_db' => require(__DIR__ . '/myDB.php'),
In controller, use this db as follows :
$query = 'select columnID from table where ID=:ID';
Yii::$app->my_db->createCommand($query)
->bindValue(':ID',1)
->queryOne();