Select max (length) - how to display the length of a group MAX
HelloI have a table with the name of DVD and names of files on the DVD.
I would like to know how to change this query to get another column, MAX_LENGHT, the MAXIMUM length of the name of FILE to a DVD of return
This doesn't work request
select DVD, FILENAME, (SELECT max(length(FILENAME)) / 2 + 4 FROM TABLE) AS MAX_LENGHT from TABLE
DESIRED RESULTDVD FILENAME MAX LENGHT
DVD1 Alina 8
DVD1 Aidan 8
DVD1 Aiden 8
DVD1 Akira 8
DVD1 Alex 8
DVD1 Alyssa 8
DVD1 Arianna 8
DVD1 Ashley 8
DVD1 Ava 8
DVD1 Benjamin8
DVD1 Bianca 8
DVD1 Blake 8
DVD1 Brandon 8
DVD1 Brayden 8
DVD1 Brayden 8
DVD1 Brianna 8
DVD1 Brielle 8
DVD1 Brooklyn8
DVD2 Dakota 11
DVD2 Dalia 11
DVD2 Daniel 11
DVD2 Dante 11
DVD2 David 11
DVD2 Diego 11
DVD2 Dingbang11
DVD2 Dominic 11
DVD2 Dylan 11
DVD2 Chase 11
DVD2 Chloe 11
DVD2 Christopher 11
DVD2 Claire 11
DVD2 Cole 11
DVD2 Connor 11
Thank youRoseline
You can use the analytic version of the function max:
SELECT DVD
, FILENAME
, MAX(LENGTH(FILENAME)) OVER (PARTITION BY DVD) AS MAX_LENGTH
FROM TABLE
Tags: Database
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