Can I use… over name & window clause


2005200720092011201320152017201910.15.2.0Apache Derby2.0BigQuery11.5Db2 (LUW)1.4.199H210.2MariaDB8.0.11MySQL19cOracle DB8.4PostgreSQL2019SQL Server3.25.0SQLite

The window clause allows to centralize and reuse window definitions. It is the last clause of <table expression>—i.e. it follows the having clause if present.

 SELECT MIN(x) OVER window_name
      , MAX(x) OVER window_name
   FROM …
[ WHERE …    ]
[ GROUP BY … ]
[HAVING …    ]
 WINDOW window_name AS ([PARTITION BY …] [ORDER BY …] …) 

Both window functions, min and max, use the same window definition.

Normative References

The window clause is defined in ISO/IEC 9075:2016-2 as part of optional feature T612.

About the Author

Photo of Markus Winand

Markus Winand is the SQL Renaissance Ambassador. He is on a mission to introduce developers to the evolution of SQL in the 21st century. Markus can be hired as trainer, speaker and consultant via winand.at.

Buy his Book on Amazon

Cover of “SQL Performance Explained”: Squirrel running on grass

The essence of SQL tuning in 200 pages

Buy on Amazon
(paperback only)

Paperback and PDF also available at Markus’ store.

Hire Markus

Markus offers SQL training and consulting for developers working at companies of any size.
Learn more »

“modern SQL” by Markus Winand is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License.
Legal | Contact | NO WARRANTY | Trademarks | Privacy and GDPR | CC-BY-NC-ND 3.0 license