querying a table bypassing wp-db

I want to get the post_content returned by a querry but i don’t want to use th wpdb->get_results($querry) function as it cuts off all php code. I tried to use plugins so that i can place code in my posts but no success so i need to take the post’s content as it is. How can i avoid security riscs and how can i get the content directly without relying on wpdb class’ functions?