What is data definition language, Database Management System

Assignment Help:

What is data definition language? Explain it in detail?

The SQL DDL allows specification of not only a set of relations, but also information after each relation, containing

a) The schema for each relation

b) The domain of values associated with each attribute

c) The integrity constraints

d) The set of indices to be maintained for each relation

e) The security and authorization information for each relation

f) The physical storage structure of each relation on disk

Domain Types in SQL

Char(n),

varchar(n), int, small int, numeric(p,d), real, double, precision,

f loat(n), date, time, timestamp.

Schema Definition in SQL

a) Primary key

b) Check

Related Discussions:- What is data definition language

What are the two types of indices, What are the two types of indices? T...

What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index

Keys, it can be possible to create any table without primary key

it can be possible to create any table without primary key

Appointment systems with sms and voice call feedback, Automated system for ...

Automated system for appointment with sms and call confirmation with service providers and user has to be initiate automatically. After selecting time and date to use service, s

Give an example of operations from the functions of a bank, Give an example...

Give an example of Operations from the functions of a bank. For creation of a saving account, you can write: bank::: create -savings-account (customer)->account. For oper

Explain the difference between drop and delete, Explain the Difference betw...

Explain the Difference between DROP and DELETE DELETE deletes one or more than one tuples of a particular relation from the database. DROP is employed to remove a table from th

Physical records, Physical Records These are the records that are store...

Physical Records These are the records that are stored in the secondary storage devices. For the database relation, physical records are the group of fields kept in adjacent me

Database application and creation, Create Relational Database Model (RDM) f...

Create Relational Database Model (RDM) for Sailing bed and breakfast club Table_Name( attribute_1, attribute_2, attribute_3, ? ,attribute_x) Primary Key ( attribute_1, attribute_2)

Database errors, Database Errors: An error is said to have occurred if the ...

Database Errors: An error is said to have occurred if the implementation of a command to manipulate the database cannot be successfully finished either due to inconsistent data or

Explain controlled redundancy, Explain controlled redundancy? Controll...

Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.

Give an example of object representation, Give an example of Object Represe...

Give an example of Object Representation For illustration, consider the implementation of a social security number within an employee object that is shown in Figure. The soci

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages