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What are the aggregate objects in the data dictionary?
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
This constraint shows that the key attribute value in each tuple must be unique, i.e., no two tuples have the similar value for the key attribute. This is because the value of the
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
A file manipulation command that extracts some of the records from a file is called ? A file manipulation command that extracts some of the records from a file is called SELECT
a set of possible data value of an attribute is called??
What is an ERD?
Give the reasons for allowing concurrency? The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long
Build a database application for a sports league. Assume your application is to keep track of teams and equipment that is checked out to teams. Explain the steps that is needed and
What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
what are the limitations of dbms?
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