Why Bitmap Index Is Used In Data Warehousing?

Why Bitmap Index Is Used In Data Warehousing? Bitmap indexes are widely used in data warehousing environments. The environments typically have large amounts of data and ad hoc queries, but a low level of concurrent DML transactions. For such applications, bitmap indexing provides: Reduced response time for large classes of ad hoc queries. What is

What Is Function Based Index In Oracle?

What Is Function Based Index In Oracle? Function-based indexes allow you to create an index based on a function or expression. The value of the function or expression is specified by the person creating the index and is stored in the index. Function-based indexes can involve multiple columns, arithmetic expressions, or maybe a PL/SQL function