PDOCrud uses PDOModel for database related operations. It supports all pdomodel functions. You can refer pdomodel documentation here.
$pdocrud = new PDOCrud();
//insert operation
$insertData = array("customer_name" => "bob", "email" => "builder@gmail.com", "postal_code" =>99423);
$pdocrud->getPDOModelObj()->insert("customertable", $insertData);
//update operation
//Example 2
$updateData = array("first_name"=>"Jon", "last_name"=>"snow", "email"=>"builder@gmail.com");
$pdomodel = $pdocrud->getPDOModelObj();
$pdomodel->where("id", 1);
$pdomodel->update("feedback", $updateData);
//Example 3
//select operation
$data = $pdocrud->getPDOModelObj()->select("orders");
print_r($data);