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A database administrator''s responsibilities and data contents
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
how does Btree differ from a B+ - tree?
Explain the Role of a database administrator a. Defining the Schema The DBA describes the schema which consists of the structure of the data in the application. The DBA
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
waht is a repeating group?
Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Strong entity set and weak entity set? Strong entity set and weak entity set: A strong entity set has a primary key. All tuples in the set are distinguishable through that key.
What is known as sequential file organization? In the sequential file organization, the records are kept in sequential order, according to the value of a "search key" of every
What are the two main goals of parallelism? Load -balance multiple small accesses, so that the throughput of such accesses enhances. Parallelize large accesses so that the res
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