Magento Sales Order Grid Customization

 Follow the steps to add column in sales order grid:

Here by i am two column called Payment method and Subtotal.

1 . app/code/local/YourFolderName/AdminHtml

2 . app/code/local/YourFolderName/AdminHtm/Block/Sales/Order/Grid.php

3 . app/code/local/YourFolderName/AdminHtm/etc/config.xml

In Grid.php

class YourFolderName_Adminhtml_Block_Sales_Order_Grid extends Mage_Adminhtml_Block_Sales_Order_Grid
{

public function __construct()
{
Mage_Adminhtml_Block_Widget_Grid::__construct();
$this->setId(‘sales_order_grid’);
$this->setUseAjax(true);
$this->setDefaultSort(‘created_at’);
$this->setDefaultDir(‘DESC’);
$this->setSaveParametersInSession(true);
}
/**
* Retrieve collection class
*
* @return string
*/
protected function _getCollectionClass()
{
return ‘sales/order_grid_collection’;
}

protected function _prepareCollection()
{

$collection = Mage::getResourceModel($this->_getCollectionClass());

//Table Decalration
$salesFlatOrder = (string)Mage::getConfig()->getTablePrefix() . ‘sales_flat_order’;
$salesFlatOrderPayment = (string)Mage::getConfig()->getTablePrefix() . ‘sales_flat_order_payment’;

$collection->getSelect()->join(array(‘sales_flat_order’ => $salesFlatOrder),
“(sales_flat_order.entity_id=main_table.entity_id)”,array(‘base_subtotal’,'sales_flat_order.increment_id as sfo_id’)
);

$collection->getSelect()->join(array(‘sales_flat_order_payment’ => $salesFlatOrderPayment),
“(sales_flat_order_payment.parent_id=main_table.entity_id)”,array(‘method’)
);
echo $collection->printlogquery(‘true’);

$this->setCollection($collection);
return Mage_Adminhtml_Block_Widget_Grid::_prepareCollection();   /* this is must to get your customization collection */

}

protected function _prepareColumns()
{

$this->addColumn(‘increment_id’, array(
‘header’=> Mage::helper(‘sales’)->__(‘Order #’),
‘width’ => ’80px’,
‘type’  => ‘text’,
‘index’ => ‘increment_id’,
‘filter_index’=>’main_table.increment_id’,
));

if (!Mage::app()->isSingleStoreMode()) {
$this->addColumn(‘store_id’, array(
‘header’    => Mage::helper(‘sales’)->__(‘Purchased From (Store)’),
‘index’     => ‘store_id’,
‘type’      => ‘store’,
‘store_view’=> true,
‘display_deleted’ => true,
));
}
$this->addColumn(‘created_at’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Purchased On’),
‘index’ => ‘created_at’,
‘type’ => ‘datetime’,
‘width’ => ’100px’,
));

$this->addColumn(‘billing_name’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Bill to Name’),
‘index’ => ‘billing_name’,
));

$this->addColumn(‘shipping_name’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Ship to Name’),
‘index’ => ‘shipping_name’,
));

$this->addColumn(‘method’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Payment Method’),
‘index’ => ‘method’,
‘filter_index’=>’sales_flat_order_payment.method’,
));

$this->addColumn(‘base_subtotal’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Subtotal’),
‘index’ => ‘base_subtotal’,
‘type’  => ‘currency’,
‘currency’ => ‘base_currency_code’,
‘filter_index’=>’sales_flat_order.base_subtotal’,
));

$this->addColumn(‘base_grand_total’, array(
‘header’ => Mage::helper(‘sales’)->__(‘G.T. (Base)’),
‘index’ => ‘base_grand_total’,
‘type’  => ‘currency’,
‘currency’ => ‘base_currency_code’,
));

$this->addColumn(‘grand_total’, array(
‘header’ => Mage::helper(‘sales’)->__(‘G.T. (Purchased)’),
‘index’ => ‘grand_total’,
‘type’  => ‘currency’,
‘currency’ => ‘order_currency_code’,
));

$this->addColumn(‘status’, array(
‘header’ => Mage::helper(‘sales’)->__(‘Status’),
‘index’ => ‘status’,
‘type’  => ‘options’,
‘width’ => ’70px’,
‘options’ => Mage::getSingleton(‘sales/order_config’)->getStatuses(),
));

if (Mage::getSingleton(‘admin/session’)->isAllowed(‘sales/order/actions/view’)) {
$this->addColumn(‘action’,
array(
‘header’    => Mage::helper(‘sales’)->__(‘Action’),
‘width’     => ’50px’,
‘type’      => ‘action’,
‘getter’     => ‘getId’,
‘actions’   => array(
array(
‘caption’ => Mage::helper(‘sales’)->__(‘View’),
‘url’     => array(‘base’=>’*/sales_order/view’),
‘field’   => ‘order_id’
)
),
‘filter’    => false,
‘sortable’  => false,
‘index’     => ‘stores’,
‘is_system’ => true,
));
}
$this->addRssList(‘rss/order/new’, Mage::helper(‘sales’)->__(‘New Order RSS’));

$this->addExportType(‘*/*/exportCsv’, Mage::helper(‘sales’)->__(‘CSV’));
$this->addExportType(‘*/*/exportExcel’, Mage::helper(‘sales’)->__(‘Excel XML’));

return Mage_Adminhtml_Block_Widget_Grid::_prepareColumns();   /* must */
}

}

In config.xml

<config>
<global>
<blocks>
<adminhtml>
<rewrite>
<sales_order_grid>YourFolderName_Adminhtml_Block_Sales_Order_Grid</sales_order_grid>
</rewrite>
</adminhtml>
</blocks>
</global>
</config>

To follow this steps to get the column in your sales order grid table.