How to create table in magento installation script

$installer = $this;

$installer->startSetup();

$table = $installer->getConnection()
    ->newTable($installer->getTable('wmpayment/webmoney_response'))
    ->addColumn('id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'identity' => true,
        'unsigned' => true,
        'nullable' => false,
        'primary'  => true,
    ), 'Id')
    ->addColumn('id_order', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array(
        'unsigned' => true,
        'nullable' => false
    ), 'Id order')
    ->addColumn('response', Varien_Db_Ddl_Table::TYPE_TEXT, null, array(
        'nullable' => false,
    ), 'Response in json format')
    ->addIndex('id_order', 'id_order');
$installer->getConnection()->createTable($table);