Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
What are the DBMS languages? Briefly explain?
Data Definition language (DDL):A database schema is specified through a set of definitions expressed through a special language called data definition language. For instance, the subsequent statement in the SQL describes the account table
Create table account (account_number char(10), balance integer)
Execution of the above DDL statement creates the account table. DDL permits a user to specify storage structure and access techniques used through the database system as well as specify certain consistency constraints such as balance of an account should on fall below Rs1000.
Data Manipulation language (DML): A data-manipulation language (DML) is a language which enables users to access or manipulate data as organized through the appropriate data model.
There are basically two types:
1) Procedural DMLs needs a user to specify what data are required and how to get those data. 2) Declarative DMLs (also referred to as nonprocedural DMLs) need a user to specify what data are required without specifying how to get those data.
Problem: A DBMS built for Online Transaction Processing (OLTP) is usually regarded as unsuitable for data warehousing. Each system is designed with a different set of requireme
What benefits can a company gain by managing its own information infrastructure and servicea
Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
List any two disadvantages of a database system ? The disadvantages of database system are: • Database systems are difficult, complex, and time-consuming to design. • Substanti
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Describe the objective of Structural Diagrams The main objective of structural diagram is to visualize, construct, specify and document static aspects of a system. Their eleme
Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat
Question 1 Discuss on transmission impairments Question 2 What is framing? Question 3 Write a note on 10Base2 10Base- T Question 4 Explain the rev
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd