T-SQL Analytic Functions

Kathi KellenbergerPragmatic Works

kkellenberger@pragmaticworks.com

www.bidn.com/blogs/kathikellenberger

History

• Window functions introduced 2005• Window functions enhanced 2012• Analytic Functions added 2012

Window Functions

• Ranking Functions• ROW_NUMBER()• RANK()• DENSE_RANK()• NTILE()

• Partitioning• Window aggregate functions

Enhancements

• ORDER BY to window aggregate functions• Framing: Rows and Range

The Analytic Functions

• LAG() and LEAD()• FIRST_VALUE() and LAST_VALUE()• PERCENT_RANK() and CUME_DIST()• PERCENTILE_DISC() and

PERCENTILE_CONT()