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!
Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked?
Ans: Since more than one user can aaccess one database, there exists the required to restrict user from using whole database in any way. Setting up access privilege can do this. Any privilege can be granted to or revoked from user along with taken of the GRANT and REVOKE statements. Each privilege could be granted or revoked individually or in a group. Such group of rights is known as ROLE and rights can be granted or revoked within in the similar way as to the user. Access privileges include SELECT, INSERT, UPDATE and DELETE.
GRANT {statement|role_name} ON {object_name} TO {user|role_name_2} [WITH GRANT OPTION]
An example of granting permission to user B for reading EMP table is:
GRANT SELECT ON emp to B;
The REVOKE statement is used to revoke the permissions from the user. The syntax for REVOKE statement is given as: REVOKE {statement|role_name} FROM {user|role_name};
Mention the purpose of SID and SOD lines SID (Serial input data line): It is an input line by which the microprocessor accepts serial data. SOD (Serial output data line)
What is an ERD?
what is cascading? what is rollback cascading? please explain in detail
What are the two main goals of parallelism? Load -balance multiple small accesses, so that the throughput of such accesses enhances. Parallelize large accesses so that the res
Consider the following relations: BRANCH( bno, street, area, city, pcode, Tel_no, Fax_no) STAFF( Sno, Fname, Lname, address, position , salary, bno) Express the subsequent qu
Benefits and limitations
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Data Control The data control mostly refers to commands that permit system and data privileges to be passed to several users. These commands are usually available to database admi
What is a data dictionary? Data Dictionary is a main source of data in a data management system. Its major function is to carry the creation and management of data definition
Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
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