.

Subsequently, one may also ask, what is bitmap in database?

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.

Beside above, what does SQL Server mean? SQL Server is a database server by Microsoft. SQL is a special-purpose programming language designed to handle data in a relational database management system. A database server is a computer program that provides database services to other programs or computers, as defined by the client-server model.

Subsequently, question is, what is a bitmap index in SQL Server?

Bitmap Indexing in DBMS. Bitmap Indexing is a special type of database indexing that uses bitmaps. This technique is used for huge databases, when column is of low cardinality and these columns are most frequently used in the query.

When would you use a bitmap index?

You should use b-tree indexes when columns are unique or near-unique; you should at least consider bitmap indexes in all other cases. Although you generally would not use a b-tree index when retrieving 40 percent of the rows in a table, using a bitmap index generally makes this task faster than doing a full table scan.