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What is conceptual schema?
The schemas at the view level are known as subschema that describe dissimilar views of the database.
What is the purpose of storage manager? The storage manager is responsible for the following a) Interaction with the file manager b) Translation of DML commands in to low
I need to Map an E-R diagram to a relational schema
Using Column aliases Example: To print column names as NAME and ANNUAL SALARY SELECT ENAME "NAME", SAL*12 "ANNUAL SALARY" FROM EMP;
Explain three main attributes of data.
assignment
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Describe Graphical User Interface? Graphical User Interfaces (GUIs) - A GUI typically displays a schema to the user in diagrammatic form. The user can then specify a query th
Rearrange the Execution Order for Efficiency Rearranging execution order for efficiency means executing such job that requires less execution time. By rearranging the object
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
What is substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
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