Magento2 : Basic Operation

Delete Data In Magento Using Collection

$id = $this->getRequest()->getParam(‘id’);  
  
//create model instance   
$model = Mage::getModel(customer/customer’);  
try {  
       //set Id and delete particular customer customer data from DB     
        $model->setId($id)->delete();  
        echo “Data deleted successfully.”;  
   
    } catch (Exception $e){  
        echo $e->getMessage();  
}

Display Collection Data

$collection->getData()

Display Collection Query

$collection->getSelect()->__toString()

Fetch Some Fields From Collection

$collection->addFieldToSelect(array('columnname1','columnname2'))>addFieldToFilter('columnname',$value);