WP QueryBuilder 1.6.2 is released.
Examples
Create Statement

Create Statement

Create a Database table.

$db::create('product_users')
    ->column('ID')->bigInt()->unsigned()->autoIncrement()->primary()->required()
    ->column('name')->string(255)->required()
    ->column('email')->string(255)->nullable()
	->column('bio')->json()->required()
	->column('created_at')->dateTime()->default('0000-00-00 00:00:00')
	->column('updated_at')->dateTime()->default('0000-00-00 00:00:00')
	->execute();

Use of foreignKey

DB::create('howdy_qb')
    ->column('name')->string(255)->required()
    ->column('email')->string(255)->required()
    ->column('howdyID')->bigInt()->unsigned()
    ->foreignKey('howdyID', 'users.ID', 'cascade')
	->index(['howdyID'])
    ->execute();

Get raw SQL without database query execution.

$sql = $db::create('howdy_qb')
    ->column('name')->string(255)->required()
    ->column('bio')->json()->required()
    ->column('howdyID')->bigInt()->unsigned()
    ->getSql();