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Example-GRANT CREATE SESSION TO MCA12;
(This command gives system level permission on creating a session - not portable)
GRANT SELECT ON EMP TO MCA12;
(Object level permission on table EMP)
GRANT SELECT, UPDATE, INSERT, DELETE ON EMP TO MCA12;
GRANT SELECT, UPDATE ON EMP TO MCA12, MCA13;
(Two users)
GRANT ALL ON EMP TO PUBLIC;
(All permission to every users, do not use it. It is very risky for database)
Revoke: It is used to revoke the permission granted.
While using extract datasets it is required to have a special workarea for interface False. It is not required to have a special workarea for interface
courier company er-diagram
What are the categories of SQL command? SQL commands are separated in to the following categories: 1. Data - Definitition Language 2. Data Manipulation language 3. Dat
Using SQL create a view RS for the relations R and S. The view consists of the columns A and D renamed as X and Y in that order. Insert a tuple into it. Show the contents of t
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
What is Specialization? Specialization: Specialization permits you to describe new types of information (new structural types or latest domains of information), although reusin
Question: (a) Prepare an ERD for the scenario given below. (b) Convert the ER diagram produced in (a) above into its physical design. You have to choose an appropriate Pri
limitations and benefits in database tecknowlagy
SELECT Statement This statement is used for retrieving information from the databases. It can be coupled with many clauses. Let us talk about these clauses in more detail:
How can Redundant Associations be done It can be done by asking questions: i) Is there a specific arrangement of network which would optimize critical aspects of completed
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