Essay Database

Object-Oriented Database Management Systems The construction of Object-Oriented Database Management Systems started in the middle 80?s, at a prototype building level, and at the beginning of the 90?s the first commercial systems appeared. The interest for the development of such systems stems from the need to cover the modeling deficiencies of their predecessors, that is the relational database management systems. They were intended to be used by applications that have to handle big and complex …

…composite object retrieval. There are many applications that have been using the relational systems very successfully now for many years and they do not need to change. However, there are a couple of other applications especially in the engineering fields that don?t do much with relational systems, mainly from the modeling aspect. For these kinds of applications, the object-oriented approach seems quite appropriate in spite of the problems that still have to be solved.