- Could I use both the traditional and RMAN backup at the same time?
- Do I need to re-index the table if there is a change in the structure?
- I have a table ABC with columns A1, A2, A3, A4, A5, A6 and A7. My index is A1, A2, A3, A5. When I run a query using only A1, A5 in the where clause, is it using the index?
You can definitely use the traditional (user-managed) hot and cold backups in conjunction with RMAN backups. But...
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
recovery from these different backups is different. RMAN can only use the RMAN backup for recovery, similarly for the user-managed backups. Make sure you practice recovery from each backup type under a variety of scenarios.
You do not need to re-index a table if you change the table's structure unless your structural change involves the index. Simply adding a column to a table will not affect any exisiting indexes. Dropping a column can affect an index if the index uses that column.
The only way to know for sure if your query is using any index is to run the query through EXPLAIN PLAN. This will tell you how Oracle is executing the query. Depending on your configuration, the index may or may not be used.
Dig Deeper on Oracle database backup and recovery
Related Q&A from Brian Peasland
Oracle expert Brian Peasland answers one reader's question about common pitfalls when connecting Oracle to outside programs.continue reading
One reader asks expert Brian Peasland a question about datafile sizes with the Oracle RMAN duplicate 10g command.continue reading
Managing parent table-child table relations in Oracle SQL environments is key to efficient programming.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.