Partitioning and the Common Subexpression Spool

The SQL Server common subexpression spool plan shape, and how it is used to implement queries using the OVER
clause.
The SQL Server common subexpression spool plan shape, and how it is used to implement queries using the OVER
clause.
How the SQL Server Segment and Sequence Project operators are used to implement window functions like ROW_NUMBER
, RANK
, and DENSE_RANK
.
Why you will sometimes see a Top operator directly above a Segment operator in SQL Server execution plans.