SQL Indexes - Wikitechy https://www.wikitechy.com/interview-questions/tag/sql-indexes/ Interview Questions Thu, 29 Sep 2022 09:06:19 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png SQL Indexes - Wikitechy https://www.wikitechy.com/interview-questions/tag/sql-indexes/ 32 32 What are all the different attributes of indexes ? https://www.wikitechy.com/interview-questions/sql/what-are-all-the-different-attributes-of-indexes/ https://www.wikitechy.com/interview-questions/sql/what-are-all-the-different-attributes-of-indexes/#respond Thu, 29 Sep 2022 09:06:19 +0000 https://www.wikitechy.com/interview-questions/?p=4875 The indexing has various attributes:

Access Types:

  • Value based search , range acess can be refered using Access types.

Access Time:

  • Time that is needed to find a data element or a set of elements are called Access Time.

Insertion Time:

  • Time needed to find an approriate space and insert a new data is known as Insertion Time.

Deletion Time:

  • Time needed to find an element and delete that element as well as update its index structure is known as Deletion Time.

Space Overhead:

  • Index always needs additional space which is provided by the space overhead.

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What is an Index ?

  • Index is a database object which improves the efficiency of the query. When queries are run against a database, an index on that database basically helps in the way the data is sorted to process the query for faster and data retrievals are much faster when we have an index.
what is an index
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