In regular SQL, I could write a query like:
SELECT DISTINCT col_1, col_2
FROM transactions
WHERE ...
However in ADQL syntax, the following query will work for a single column, but not for multiple:
SELECT distinct(col_1)
FROM transactions
WHERE ...
--works
SELECT distinct(col_1, col_2)
FROM transactions
WHERE ...
--fails
Is there any options in ADQL (https://docs.appdynamics.com/display/PRO21/ADQL+Reference) to achieve the same end result?
I tried the following "hack" (and with a small set of data it seems to work... but will timeout with a large set of data).
SELECT distinct(concat(col_1, ",", col_2))
FROM transactions
WHERE ...
--works in limited cases... but it also just returns a single merged column
--that I would still later need to parse out (via CSV export)
question from:
https://stackoverflow.com/questions/65942338/in-appdynamics-adql-is-there-a-way-to-select-distinct-across-multiple-colums 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…