Bitmap index
id:
bitmap-index-262-10162391
title:
Bitmap index
text:
A bitmap index is a special kind of database index that uses bitmaps. Bitmap indexes have traditionally been considered to work well for low-cardinality columns, which have a modest number of distinct values, either absolutely, or relative to the number of records that contain the data. The extreme case of low cardinality is Boolean data, which has two values, True and False. Bitmap indexes use bit arrays and answer queries by performing bitwise logical operations on these bitmaps. Bitmap indexe
brand slug:
wiki
category slug:
encyclopedia
description:
Database indexing technique
original url:
https://en.wikipedia.org/wiki/Bitmap_index
date created:
date modified:
2023-12-07T08:18:28Z
main entity:
{"identifier":"Q878825","url":"https://www.wikidata.org/entity/Q878825"}
image:
fields total:
13
integrity:
14