Auto Indexing Wrap-Up . Exams of Oracle . The Clustering Factor
Physical Organization-Indexes-1
On 10/10/2022 by Robert CorvinoHow the data is organized physically on disk deeply impacts these calculations, as it materially affects how expensive (or inexpensive) index access will be. Suppose you have a table where the rows have a primary key populated by a sequence. As data is added to the table, rows with sequential sequence numbers might be, in
Auto Indexing Wrap-Up . Character Strings . Exams of Oracle . The Clustering Factor
When Should You Use a Bitmap Index?-Indexes
On 06/10/2022 by Robert CorvinoBitmap indexes are most appropriate on low distinct cardinality data (i.e., data with relatively few discrete values when compared to the cardinality of the entire set). It is not really possible to put a value on this—in other words, it is difficult to define what low distinct cardinality is truly. In a set of a
