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what is attribute is attribute inheritance in dbms?
What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.
What are the General Transformation Rules for Relational operations? Ans: The transformation rules transform one relational algebra expression to AN EQUIVALENT ONE 1. E
Oracle & Distributed Databases 1. Differentiate between PL/SQL functions and procedures. 2. Draw the diagram of logical structure of oracle database and explain it in brief.
Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
WHAT IS DSS? WRITE ITS REQUIREMENTS.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
as a customer service employee explain five measures you would recommend to make even a displeased students patronize the school canteen
What is the main difference between read-only and update methods? A read-only method does not affect the values of a variable in an object, whereas an update method may alter t
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