What Is a Database Management System and Types of databases Explained?
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What Is a Database Management System and Types of databases Explained?
Before you ask our team to “do my database management assignment,” it is important that you know the basics of a database management system.
A database management system (or DBMS) is basically a computerised data-keeping system. A user of the system has the facilities to perform different operations on a similar system for either management of the database structure itself or the manipulation of the data in the database.
There are quite a few types of database management systems. Following are the seven most common database management systems in practice:
- Hierarchical databases
- Network databases
- Relational databases
- Object-oriented databases
- Graph databases
- ER model databases
- Document databases
- NoSQL databases
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Our Expert Are Here to Help in Latest DBMS Technology
As the DBMS technology evolves, the requirements of the DBMS assignments are going to change accordingly. In order to be effective in providing relevant database management assignment help to the students, our team of database management homework experts goes through regular training and workshops.
You can ask our experts to “do my database management homework” on almost all DBMS software, including:
- SolarWinds Database Performance Analyser
- DbVisualiser
- ManageEngine Applications Manager
- Oracle RDBMS
- IBM DB2
- Microsoft SQL Server
- SAP Sybase ASE
- Teradata
- ADABAS
- MySQL
Besides these DMBS software, you can get database management assignment help on other DBMS tools too.
Advantages of Database Applications
There are plenty of reasons why database applications are getting so popular. A majority of these database applications have the following advantages to offer:
- Data integrity
- Data security
- Better data integration
- Minimised data inconsistency
- Faster data access
- Better decision making
- Simplified recovery and backup
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Frequently Asked Questions by Students
Que 1. What are the differences between a DBMS and RDBMS?
Ans. The differences between DBMS and RDMS are quite evident:
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DBMS applications store data as a file, while RDBMS applications store data in a tabular form.
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DBMS stores data in either a hierarchical form or a navigational form, while RDBMS stores data values in the form of tables.
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DBMS does not have normalisation, but RDBMS does.
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DBMS does not apply any security with regards to data manipulation, while RDBMS defines the integrity constraint for the purpose of Atomicity, Consistency, Isolation and Durability property.
Que 2. Explain the terms database and DBMS. Also, mention the different types of DBMS.
Ans. A database management system (or DBMS) is basically a computerised data-keeping system. A user of the system has the facilities to perform different operations on such a system for either manipulation of the information in the database or the management of the database structure itself.
Following are the seven most common database management systems in practice:
- Hierarchical databases
- Network databases
- Relational databases
- Object-oriented databases
- Graph databases
- ER model databases
- Document databases
- NoSQL databases
Que 3. What are the advantages of DBMS?
Ans. Some of the most common advantages of DBMS include:
- Data integrity
- Data security
- Better data integration
- Minimised data inconsistency
- Faster data access
- Better decision making
- Simplified recovery and backup
Que 4. Mention the different languages present in DBMS.
Ans. The different types of DBMS languages are as follows:
- Data Definition Language (DDL) − Create, Drop, Truncate, Rename
- Data Manipulation Language (DML) − Select, Insert, Delete, Update
- Data Control Language (DCL) − Revoke, Grant
- Transaction Control Language (TCL) − Rollback, Commit
Que 5. What do you understand by query optimisation?
Ans. Query optimisation is the process of selecting an efficient execution plan for evaluating the query. It is of great importance for the performance of a relational database, especially for the execution of complex SQL statements.
Que 6. Do we consider NULL values the same as that of blank space or zero?
Ans. It is crucial to understand that a NULL value is not as same as zero or a blank space. As you may realise, a NULL value is a value that is "unavailable, unknown, unassigned or not applicable. On the other hand, zero is a number, and blank space is a character.
Que 7. What do you understand by aggregation and atomicity?
Ans. In database management, aggregation refers to the process by which entities are combined to form a single meaningful entity. Atomicity means that several operations can be grouped into a single logical entity.
Que 8. What are the different levels of abstraction in the DBMS?
Ans. There are mainly three levels of data abstraction in DBMS:
- Physical or internal level
- Logical or conceptual level
- View or external level
Que 9. What is an entity-relationship model?
Ans. The entity-relationship model (ERM) is basically a conceptual model that represents the information structure of a problem domain in terms of relationships and entities. This model is widely used in database design and systems analysis to capture the requirements of a system or a problem domain.
Que 10. What do you understand by the terms Entity, Entity Type, and Entity Set in DBMS?
Ans. In DBMS, Entity refers to a thing in the real world with independent existence. An Entity Type refers to a category of a particular entity. And an Entity Set refers to a set of all entities of a particular entity type.
