⟩ Explain What are the different approaches used by Optimizer in choosing an execution plan ?
Rule-based and Cost-based.
Rule-based and Cost-based.
How To Use SELECT Statement to Count the Number of Rows in Oracle?
Can SELECT Statements Be Used on Views in Oracle?
How To Filter Out Duplications in the Returning Rows using Oracle?
What Are Group Functions in Oracle?
How To Use Group Functions in the SELECT Clause using Oracle?
Can Group Functions Be Mixed with Non-group Selection Fields?
How To Divide Query Output into Groups in Oracle?
How To Apply Filtering Criteria at Group Level in Oracle?
How To Count Duplicated Values in a Column in Oracle?
Can Multiple Columns Be Used in GROUP BY in Oracle?