- SQL
- May 15, 2024
Understanding Function Based Index In Oracle Database
Traditionally, performing a function on an indexed column in the where clause of a query guaranteed an index would not…
- Architecture
- November 8, 2020
Understanding FLASHBACK Technology
In Oracle database,under SGA there is an optional memory component known as – Flashback buffer.When Flashback Database is enabled, the…
- Performance Tuning
- November 1, 2020
Understanding INVISIBLE Index
By default an index is VISIBLE.The Oracle optimizer will pick only VISIBLE index. Oracle 11g allows indexes to be marked…
- Performance Tuning
- November 1, 2020
Understanding UNUSABLE Index
By default an index is USABLE.The Oracle optimizer will pick only USABLE index. Oracle indexes can go into a UNUSABLE…