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What are ways of finding out either an update is required or not for derived attributes?
The ways to find out an update is required or, not are as:
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
Which database object does not physically exist? A view database object does not physically exist.
What is a security? Securities are claims on financial assets. They can be illustrated as "claim checks" which give their owners the right to receive funds in the future. Sec
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
projects?
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
What is NULL? Simply NULL means not in value.
Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def
Explain degree of relation? Degree of a Relation - The degree or arity of a relation is the number of attributes n of its relation schema.
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