Books > Computing & IT > Computer programming > Programming languages
|
Buy Now
Query Processing in Database Systems (Paperback, Softcover reprint of the original 1st ed. 1985)
Loot Price: R2,985
Discovery Miles 29 850
|
|
Query Processing in Database Systems (Paperback, Softcover reprint of the original 1st ed. 1985)
Series: Topics in Information Systems
Expected to ship within 10 - 15 working days
|
This book is an anthology of the results of research and
development in database query processing during the past decade.
The relational model of data provided tremendous impetus for
research into query processing. Since a relational query does not
specify access paths to the stored data, the database management
system (DBMS) must provide an intelligent query-processing
subsystem which will evaluate a number of potentially efficient
strategies for processing the query and select the one that
optimizes a given performance measure. The degree of sophistication
of this subsystem, often called the optimizer, critically affects
the performance of the DBMS. Research into query processing thus
started has taken off in several directions during the past decade.
The emergence of research into distributed databases has enormously
complicated the tasks of the optimizer. In a distributed
environment, the database may be partitioned into horizontal or
vertical fragments of relations. Replicas of the fragments may be
stored in different sites of a network and even migrate to other
sites. The measure of performance of a query in a distributed
system must include the communication cost between sites. To
minimize communication costs for-queries involving multiple
relations across multiple sites, optimizers may also have to
consider semi-join techniques.
General
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!
|
|
Email address subscribed successfully.
A activation email has been sent to you.
Please click the link in that email to activate your subscription.