= Bitmap index
{wiki=Bitmap_index}
A Bitmap Index is a type of database index that uses bitmaps (arrays of bits) to represent the presence or absence of a value for a particular field in a database table. This index structure is particularly efficient for columns with a limited number of distinct values, known as low-cardinality columns. Bitmap indexes are commonly used in analytical databases or data warehousing environments where complex queries involving multiple dimensions and aggregation are frequent.
Back to article page