Different Types of Database management systems Essay Example for Free

Different Types of Database management systems EssayA Database is a collection of records. Database management systems atomic number 18 designed as the means of managing all the records. Database guidance is a softw atomic number 18 system that uses a standard method and running queries with some of them designed for the oversight and proper control of databases. Types of Database Management SystemsThere be four structural types of database management systems * Hierarchical databases. * Network databases. * Relational databases. * Object-oriented databasesHierarchical Databases (DBMS) In the Hierarchical Database Model we have to learn about the databases. It is very steadfast and simple. In a hierarchical database, records contain information about there groups of parent/ shaver relationships, just like as a tree body social structure. The structure implies that a record can have withal a repeating information. In this structure Data follows a series of records, It is a s et of field of study values attached to it. It collects all records together as a record type. These record types are the akin of tables in the relational model, and with the individual records being the equivalent of rows. To create links between these record types, the hierarchical model uses these type Relationships.Advantage Hierarchical database can be accessed and updated rapidly because in this model structure is like as a tree and the relationships between records are defined in advance. This feature is a two-edged. Disadvantage This type of database structure is that each child in the tree may have only one parent, and relationships or linkages between children are not permitted, even if they make sense from a reproducible standpoint. Hierarchical databases are so in their design. it can adding a new field or record requires that the entire database be redefined.Network Database A intercommunicate databases are mainly used on a large digital computers. It more connecti ons can be made between different types of data, network databases are considered more efficiency It contains limitations must be considered when we have to use this kind of database. It is Similar to the hierarchical databases, network databases .Network databases are akin(predicate) to hierarchical databases by also having a hierarchical structure. A network database looks more like a cobweb or interconnected network of records. In network databases, children are called members and parents are called occupier. The difference between each child or member can have more than one parent.The Approval of the network data model similar with the esteem of the hierarchical data model. Some data were more naturally modeled with more than one parent per child. The network model authorized the model of many-to-many relationships in data.The network model is very similar to the hierarchical model really. Actually the hierarchical model is a subset of the network model. However, instead of us ing a single-parent tree hierarchy, the network model uses set theory to provide a tree-like hierarchy with the exception that child tables were allowed to have more than one parent. It supports many-to-many relationships.