Explain the encoding technique used in bitmaps indexes.For each distinct value, one bitmap is used. The number of bitmaps can be reduced using log(C) bitmaps with to represent the values in each bin. Here, C is the number of distinct values. This optimizes space at the cost of accessing bitmaps when a query is generated.
Explain the encoding technique used in bitmaps indexes.One bitmap is commonly used for every single distinct value. When opted for different types of encoding, the number of bitmaps could be reduced. Space optimization can be achieved, except when the query is generated; bit maps need to be accessed