As a budding database administrator or someone hoping to land a career in the fields of Database administration, you ought to understand the various types of database systems available and how each of them operates.
In our today’s article guide, I would like to update you on Types Of Database Systems In Database Administration in 2021.
The main types of database available are: Network Databases, Relational Databases, Graph Databases, Document Databases, and Hierarchical Databases.
Network Database
The network database system is the type of database management system which connects data based on a parent-child relationship. This is such that every data is connected to at least one other data which could be named as its data. It is designed in such a way that a critical look at the data structure produces a web-like outlook.
With this kind of database system, every data has one parent but could have many other children.
Relational Database
A relational database is the type of database that deals with a collection of data items that have a pre-determined pattern of relationship between them.
Such items in the relational database are further grouped in tables, using the rows and columns.
Graph Database
This is the type of database system which uses graphical representations of nodes and edges to express the relationship between different sets of data values.
The Graph database uses edges as the relationship between nodes. Whereas the nodes are the various data pieces or forms that are input to the system.
With the Graph database system, various relationships between nodes can be seen easily by taking a closer look. This makes it more suitable for handling data that have close inter-connections.
Document Databases
Document Database systems are currently some of the most-used database systems. Unlike the relational and other database systems described in previous subheadings, this database system is not built on relationships. Data is stored in documents which are grouped based on two parameters; key and value.
The key is the unique code that identifies every document and the value is what it contains.
This system is mostly used for largely uncategorized or unlinked data.
Hierarchical Database
This type of database system works with the tree-like structure. Data is arranged based on direct parent and children link between the various elements.
Every field in this system has at least one child which falls right below it in the tree diagram except for the last field or last child in the diagram.
Based on the type of system this database uses, each tree diagram represents specific forms of data. This, therefore, makes it easy for data to be retrieved and distributed as each type of data stands alone.
Conclusion
The various databases available are mainly grouped into SQL Databases and NO SQL Databases. With the former being made up of Network Database, Relational Database and Hierarchical Database. While NO SQL Databases include Document Databases and Graph databases. The SQL Databases are usually designed in the tree-diagram structure whereas the NO SQL Database usually uses the key and value format of data classification and representation.
As a database administrator, you ought to know the right database model that would work best for the volume of data you deal with.