Split
Short Description
SQL Server is agreggating data from a function such as MAX, MIN, SUM, AVG etc.
Detailed Description​
Aggregation functions are used to group data hence usually take a larger data set and pass on a reduced set to the next explain step.
Additional Links​
- Microsoft Documentation - Explain Plans
- Microsoft Documentation - Aggregate Functions (Transact-SQL)
- Plansplaining - Hugo Kornelis' Blog series
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