Database Management

What is Data base management system?

AMANDEEP KAUR answered  •  Oct 26, 2019
A database management system (DBMS) is a software package designed to define, manipulate, retrieve and manage data in a database. A DBMS generally manipulates the data itself, the data format, field names, record structure and file structure. It also defines rules to validate and manipulate this data.

A DBMS relieves users of framing programs for data maintenance. Fourth-generation query languages, such as SQL, are used along with the DBMS package to interact with a database.

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Revathy Suresh answered  •  May 22, 2019
What is the difference between VARCHAR and CHAR in MySQL ? What type of data types fall under this?

What are the twp characteristics of image formed by plane mirror?

Sonali Mukherjee answered  •  Jan 23, 2019
1.Plan mirror from an erect image.
2.It forms a virtual image.
3. Size of the image is same as that of the object.
4 .Image is formed at the same distance behind the mirror as the object stand in front of it.

How trigger is functioning?

Sidharth Singh answered  •  Sep 15, 2018
A database trigger is special stored procedure that is run when specific actions occur within a database.  
Most triggers are defined to run when changes are made to a table’s data.  
Triggers can be defined to run instead of or after DML (Data Manipulation Language) actions such as INSERT, UPDATE, and DELETE.

What is c programing language ?

Mayank Sharma answered  •  Aug 02, 2018
C is a high-level and general-purpose programming language that is ideal for developing firmware or portable applications. Originally intended for writing system software, C was developed at Bell Labs by Dennis Ritchie for the Unix Operating System in the early 1970s.

What do you understand by Data Redundancy?

Nitin Mishra answered  •  Jul 17, 2018
Data redundancy is a condition created within a database or data storage technology in which the same piece of data is held in two separate places. This can mean two different fields within a single database, or two different spots in multiple software environments or platforms.

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