a specialization of Big Ball of Mud that requires common knowledge of all business rules within consumers. the database is the system.
every consumer of data within a given system makes direct queries against tables within a backing store, re-applying known rules and meaning to data elements either through duplicated code or mystifying SQL kludges.
the beauty of this pattern is that it may be scaled easily to Enterprise Data Cloud (aka Oort Data Cloud) simply by publishing data diagrams. who needs web services or integration platforms when you have SQL?