When Should You Rebuilt Indexes?

1.	When Should You Rebuilt Indexes?
Answer» In 90% cases - NEVER. When the data in index is sparse (lots of HOLES in index, due to DELETES or UPDATES) and your query is usually range based. Also index blevel is one of the key indicators of performance of sql queries doing Index range scans. In 90% cases - NEVER. When the data in index is sparse (lots of holes in index, due to deletes or updates) and your query is usually range based. Also index blevel is one of the key indicators of performance of sql queries doing Index range scans.

Answer»

In 90% cases - NEVER. When the data in index is sparse (lots of HOLES in index, due to DELETES or UPDATES) and your query is usually range based. Also index blevel is one of the key indicators of performance of sql queries doing Index range scans.

In 90% cases - NEVER. When the data in index is sparse (lots of holes in index, due to deletes or updates) and your query is usually range based. Also index blevel is one of the key indicators of performance of sql queries doing Index range scans.

Discussion

No Comment Found

Related InterviewSolutions

Can You Import Objects From Oracle Version 7.3 To 9i?
Suppose A Column Has Many Repeated Values. Which Type Of Index You Should Create On This Column?
If A Table Has Few Rows, Should You Create Indexes On This Table?
How Do You Capture An Exception In Oracle?
What Is Recursive Sql?
What Are Different Types Of Cursors?
Can You Pivot The Results Of A Query?
What Is Null?
What Is Execute Immediate?
What Is A Database Link? What Is The Difference Between A Public And A Private Database Link? What Is A Fixed User Database Link?