- Why do we need database?
- What is the most important part of a database?
- What are the 5 major parts of a database system?
- What are the main features of a relational database?
- What are disadvantages of database?
- What are the applications of DBMS?
- What is the advantage and disadvantage of DBMS?
- What is the difference between a table and a database?
- How do you structure a database?
- What are features of a database?
- What are three elements of a database?
- What is Rdbms and its features?
- What is the relationship between entities and database tables?
- What are the advantages of DBMS?
- What are the four components of a database system?
- What are the components of data model?
- What are the components of relational database?
- What is the main function of a database?
- What are data type in database?
Why do we need database?
Databases can store very large numbers of records efficiently (they take up little space).
It is very quick and easy to find information .
It is easy to add new data and to edit or delete old data..
What is the most important part of a database?
DBMS exists to collect, store, process and access data, the most important component. The database contains both the actual or operational data and the metadata.
What are the 5 major parts of a database system?
The database management system can be divided into five major components, they are:Hardware.Software.Data.Procedures.Database Access Language.
What are the main features of a relational database?
The main characteristics of a relational database are:it is built from a set of unique tables (also called relations)a table contains data about just one entity.tables must have a primary key.tables are linked by primary and foreign keys.
What are disadvantages of database?
DisadvantagesDatabase systems are complex, difficult, and time-consuming to design.Substantial hardware and software start-up costs.Damage to database affects virtually all applications programs.Extensive conversion costs in moving form a file-based system to a database system.Initial training required for all programmers and users.
What are the applications of DBMS?
Application of DBMSSectorUse of DBMSBankingFor customer information, account activities, payments, deposits, loans, etc.AirlinesFor reservations and schedule information.UniversitiesFor student information, course registrations, colleges and grades.5 more rows•Oct 7, 2020
What is the advantage and disadvantage of DBMS?
one of the disadvantages of dbms is Database systems require sophisticated hardware and software and highly skilled personnel. The cost of maintaining the hardware, software, and personnel required to operate and manage a database system can be substantial.
What is the difference between a table and a database?
A database has tables of data, views, indexes and programs. … database is a collection of several components like tables, indexes, stored procedures and so on. A table is a two dimensional structure that contains several columns and rows. It is contains all the data in form of several records.
How do you structure a database?
The design process consists of the following steps:Determine the purpose of your database. … Find and organize the information required. … Divide the information into tables. … Turn information items into columns. … Specify primary keys. … Set up the table relationships. … Refine your design. … Apply the normalization rules.
What are features of a database?
It provides several key features:stores data in one central location.allows data to be shared by many users.provides user interfaces to work with the data.creates backups.controls who can access and edit the data.
What are three elements of a database?
The Elements of a DatabaseThe database schema.Schema objects.Indexes.Tables.Fields and columns.Records and rows.Keys.Relationships.More items…•
What is Rdbms and its features?
Answer: RDBMS is a database management system based on relational model defined by E.F. Codd. Data is stored in the form of rows and columns. The relations among tables are also stored in the form of the table.
What is the relationship between entities and database tables?
An entity set is a group of similar entities and these entities can have attributes. In terms of DBMS, an entity is a table or attribute of a table in database, so by showing relationship among tables and their attributes, ER diagram shows the complete logical structure of a database.
What are the advantages of DBMS?
Advantages of Database Management SystemReducing Data Redundancy. The file based data management systems contained multiple files that were stored in many different locations in a system or even across multiple systems. … Sharing of Data. … Data Integrity. … Data Security. … Privacy. … Backup and Recovery. … Data Consistency.
What are the four components of a database system?
The four components in a database system are: the user, the database application, the database management system (DBMS) and the database.
What are the components of data model?
Components of a Data ModelData set. A data set contains the logic to retrieve data from a single data source. … Event triggers. A trigger checks for an event. … Flexfields. A flexfield is a structure specific to Oracle Applications. … Lists of values. … Parameters. … Bursting Definitions. … Custom Metadata (for Web Content Servers)
What are the components of relational database?
The basic structures of a relational database (as defined by the relational model) are tables, columns (or fields), rows (or records), and keys. This section describes these elements.
What is the main function of a database?
The ultimate purpose of a database management system is to store and transform data into information to support making decisions. A DBMS consists of the following three elements: The physical database: the collection of files that contain the data.
What are data type in database?
A database data type refers to the format of data storage that can hold a distinct type or range of values. When computer programs store data in variables, each variable must be designated a distinct data type. Some common data types are as follows: integers, characters, strings, floating point numbers and arrays.