Example:
I want to check if an integer is greater than any of the integers in a set of rows. If I try to use the > comparison operator, I’ll get an error:
dbadmin=> SELECT 5 > (SELECT 5 UNION ALL SELECT 6 UNION SELECT 7) "5 is GT 5, 6 or 7)";
ERROR 4840: Subquery used as an expression returned more than one row
But if I add the ANY keyword, I get my answer:
dbadmin=> SELECT 5 > ANY (SELECT 5 UNION ALL SELECT 6 UNION SELECT 7) "5 is GT 5, 6 or 7";
5 is GT 5, 6 or 7
-------------------
f
(1 row)
dbadmin=> SELECT 5 > ANY (SELECT 4 UNION ALL SELECT 6 UNION SELECT 7) "5 is GT 4, 6 or 7";
5 is GT 4, 6 or 7
-------------------
t
(1 row)
Helpful Links:https://www.vertica.com/docs/latest/HTML/Content/Authoring/AnalyzingData/Queries/Subqueries/ANYSOMEAndALL.htm
Have fun!
About the Author
James Knicely
Vertica Field Chief Technologist
I've had the privilege of working with many database technologies in my career. But after being introduced to Vertica in May of 2011 as a client, I was hooked on the new technology after witnessing a query run in milliseconds that had previously ran for hours on the legacy database we had in place. It was then that I knew I wanted to eventually join the Vertica team, and 4 years later I did! I am currently a Vertica evangelist and am ready to help you get on board! Please feel free to reach out to me with any questions you have about Vertica and make sure to follow my Vertica Quick Tips!
