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What is object identity?
An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
Sub query in the UPDATE command : Example : //Double the commission for employees, who have got at least 2 increments. UPDATE EMP SET COMM = COMM * 2 WHERE
A field-groups statement or an insert statement reverses storage space and transfers values. False.
Relational Algebra is a set of basic operations used to influence the data in relational model. These operations allow the user to specify basic retrieval request. The result of re
Explain the benefit of OOM. Main benefits of object oriented modeling are development of system become fast, quality of the system get improve. It gives freedom of use of alrea
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
#question benefits and limitations of data models..
Give an example of multiple inheritance. One example of multiple inheritance is a committee for students affair which include faculty and administrative staff member.
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
What is the use of RAID? A variety of disk-organization methods, collectively called redundant arrays of independent disks are used to better the performance and reliability.
what do you understand by enhanced entity-relationship
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