Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Indices can speed up query processing, but it's usually a terrible idea to index every attribute, and every combination of attributes, that could be used as a search key? Why do you think that is?
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- By removing columns that meet particular criteria, the select process in a relational database may reduce the size of a table.There are two ways to look at it.arrow_forwardIs this true or false? When a column in a database table does not contain any data, it is referred to as being null.arrow_forwardWhat exactly is the index? What are the many sorts of indices?arrow_forward
- When it comes to database systems, tables are a great option. Is it possible for you to write a few lines about NULL?arrow_forwardIn a relational database, a select operation may reduce the size of a table by removing columns that don't meet a set of criteria.Is it right or wrong?arrow_forwardAn index may speed up queries, but it's usually a terrible idea to create an index for every property or combination of properties that might be used as search keys. I'd want to know more about this.arrow_forward
- Reducing the size of a table in a relational database may be done using a select operation by removing columns that aren't needed.Is that so, or not?arrow_forwardBy removing columns that meet particular criteria, the select process in a relational database may reduce the size of a table.There are two ways to look at it.arrow_forwardHow do you balance the trade-off between indexing for query performance and the overhead of maintaining those indexes?arrow_forward
- While working with a relational database, a select operation may be used to prune unnecessary columns from a table, making it more manageable.Could it be real or false?arrow_forwardWhat are indexes? What are some problems that can be caused by building too many indexes?arrow_forwardThe use of indices speeds up query processing, although it is usually a terrible idea to establish them for every possible search key. Why?arrow_forward
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