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What are called multilevel indices?
Indices with two or more levels are known as multilevel indices.
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
Spanned and unspanned organisation? Spanned and unspanned organization: If records are not permited to cross block boundaries then the organisation is called unspanned record
what is cascading rollback
What is recursion? Is it possible for a stored procedure to call itself or recursive stored procedure? How many levels of SP nesting is possible? Recursion is method of proble
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
What is the use of integrity constraints? Integrity constraints make sure that changes made to the database by authorized users do not result in a loss of data consistency. The
To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;
Describe how you can simplify Operations. To simplify operation, one should use inheritance, where possible to use, to reduce the quantity of distinct operations. Introduce new
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
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