What Is Cost-based Optimizer?

1.	What Is Cost-based Optimizer?
Answer» Cost-based optimizer is the optimizer COMPONENT of the Oracle, which is RECOMMENDED and supported by Oracle. It DETERMINES query plans based on overall cost of usage of each resource to get the BEST possible plan with respect to the resource usage cost. It uses internal statistics to determine the best execution plan for the statement. Cost-based optimizer is the optimizer component of the Oracle, which is recommended and supported by Oracle. It determines query plans based on overall cost of usage of each resource to get the best possible plan with respect to the resource usage cost. It uses internal statistics to determine the best execution plan for the statement.

Answer»

Cost-based optimizer is the optimizer COMPONENT of the Oracle, which is RECOMMENDED and supported by Oracle. It DETERMINES query plans based on overall cost of usage of each resource to get the BEST possible plan with respect to the resource usage cost.
It uses internal statistics to determine the best execution plan for the statement.

Cost-based optimizer is the optimizer component of the Oracle, which is recommended and supported by Oracle. It determines query plans based on overall cost of usage of each resource to get the best possible plan with respect to the resource usage cost.
It uses internal statistics to determine the best execution plan for the statement.

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?