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Explain view in RDBMS?
View - A view is a relation (virtual rather than base) and could be used in query expressions, which is, queries can be written by using the view as a relation. Instead, a view is a named table in which is represented, not through its own physically separate stored data, but through its definition in terms of other named tables (base tables or views). The base relations on that a view is based are sometimes known as the existing relations. The definition of a view in a create view statement is stored within the system catalog. The syntax to create a view is:
CREATE [OR REPLACE] VIEW [()] AS
WITH {READ ONLY|CHECK OPTION [CONSTRAINT
]};
What is Disadvantages Of DBMS ? 1. Cost of Software and Hardware and Migration - A important disadvantage of the DBMS system is cost. 2. Reduced Response and Throughpu
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
The Form input elements are: Reporter name text type input Password
Which model is record based logical model? Network Modelis basically known as record based logical model.
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
What is abstraction? Abstraction in the object orientation is a idea that provide opportunity to express necessary properties of object without providing much details of the im
Advantages and disadvantages of icloud based storage
prototype of a distributed information system for a national car part retail outlet chain.
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
WHAT IS DSS? WRITE ITS REQUIREMENTS.
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