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The External or View Level
The external or view level is the highest level of abstraction of database. It gives a window on the conceptual view, which permits the user to see only the data of interest to them. The user can be either an end user or an application program. There can be a lot of external views as any number of external schemas can be defined and they can overlap each other. It contains of the definition of logical records and relationships in the external view. It also has the methods for deriving the objects such as attributes, entities and relationships in the external view from the Conceptual view.
Logical DBMS Architecture
Problem 1. Describe the Oracle Architecture with a neat labeled diagram, Also explain the individual components of the Architecture. 2. Write about the following Oracle 9i o
What is ODBC ? ODBC - Open DataBase Connectivity which is also denoted by ODBC enable the integration of SQL along with a common-purpose programming language. ODBC expose data
average response time?
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what is query processing ,query optimization and performance turring?
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
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Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF. Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relati
Why containment is important in oosystems? Containment is an significant concept in oosystems because it allows dissimilar users to view data at different granularities.
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