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Which database level is closest to the users?
External database level is closest to the users.
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
Describe Query evaluation engine? Query Evaluation engine: Vehicle executes low-level instructions obtained through the DML compiler. The Storage Manager Components gives in
What is data definition language? Explain it in detail? The SQL DDL allows specification of not only a set of relations, but also information after each relation, containing
What is data model? Explain object based and record based data models? Ans: A data model is an abstract model in which describes how data is represented and accessed. (i)
E-R model uses this symbol to represent weak entity set ? A Doubly outlined rectangle symbol is used to represent weak entity set.
Recovery Techniques: After Reading the types of failures and database errors, let us talk about how to recover from the failures. Recovery can be complete using/restoring the previ
What is meant by log-based recovery? The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update a
What are the several forms of identity? a) Value b) Name c) Built-in
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
List and explain the memory constructs of the Oracle 12c databases?
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