About the optimizer's choice of sort avoidance

About the optimizer's choice of sort avoidance Some SQL statements require that data be ordered, including those with ORDER BY, GROUP BY, and DISTINCT. MIN() and MAX() aggregates also require ordering of data. Sort avoidance

can sometimes avoid sorting steps for:

Statements with ORDER BY
See .

can also perform the following optimizations, but they are not based on cost:

Sort avoidance for DISTINCT and GROUP BYs
See .
Statements with a MIN() aggregate
See .