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Critically explained the benefits and limitations of different database technologies with proper examples
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
how to prepare a data dictionary for online examination system for certified courses?
Define query language? A query is a statement requesting the retrieval of information. The portion of DML that includes information retrieval is known as a query language.
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
Discuss deferred update technique of recovery. What are the advantages? Ans: The deferred update methods do not physically update the database on disk till after a transact
Whta is the advantage of the database management approach? The advantage of the database management approach is data is integrated and can be accessed by multiple programs.
Consider the relations given below Borrower (id_no, name) Book (accno., title, author, borrower_idno) (a) Define the above relations as tables in SQL forming real world assumptio
what is the importance of back up files
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