Quick Answer: What Is Database Description?

What are 3 types of databases?

Types of databasesCentralised database.Distributed database.Personal database.End-user database.Commercial database.NoSQL database.Operational database.Relational database.More items…•.

How would you add an attribute class to the student table?

Step 1 of 3. SQL Data Definition Commands. (a) To add an attribute “Class” to student table, the following commands can be used: Query: ALTER TABLE Student_Table. ADD Class VARCHAR2(6); The above query adds the field “Class” to the existing Student_Table table. Output: … Chapter 6, Problem 4PE is solved.

What are the uses of database?

Why use a 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.Data can be searched easily, eg ‘find all Ford cars’.More items…

Which is the best database?

Top 5 Best DatabasesMySQL. MySQL is used in almost all the open source web projects that require a database in the back-end. … PostgreSQL. PotgreSQL is a open source object-relational database system. … Oracle. Oracle is the best database for any mission critical commercial application. … SQLite. … Microsoft SQL Server.

What is a database package?

A database package is a 3rd Party database product purchased/licensed, so that a company’s IT programmers don’t have to write the code to create the database system themselves. … Also waived is the need to hire a dedicated DBA to install/maintain the database.

What are the components of database?

Below is a list of components within the database and its environment.Software. This is the set of programs used to control and manage the overall database. … Hardware. … Data. … Procedures. … Database Access Language. … Query Processor. … Run Time Database Manager. … Data Manager.More items…•

What are the 4 types of database?

Four types of database management systemshierarchical database systems.network database systems.object-oriented database systems.

What is Database explain with example?

Definition of Database or Database meaning: A database is a systematic collection of data. They support electronic storage and manipulation of data. Databases make data management easy. DBMS stands for Database Management System. We have four major types of DBMSs namely Hierarchical, Network, Relational, Object- …

What is importance of database?

Databases are a collection of organized information that can easily be accessed, managed and updated. Database systems are very important to your business because they communicate information related to your sales transactions, product inventory, customer profiles and marketing activities.

What is a database form?

A form is a database object that you can use to enter, edit, or display data from a table or a query. You can use forms to control access to data, such as which fields of data are displayed. … Providing those users with a form that contains just the necessary fields makes it easier for them to use the database.

How do you write a database description?

Description of the Database: Include topical keywords, but try to avoid using too much hype copied from the marketing material. Mention the most unique features, and try to be as clear and concise as possible. Include examples of types of searches, or information retrieval, that this database makes possible.