While using the below function in tableau
RAWSQLAGG_STR("RTRIM(XMLAGG(XMLELEMENT(E,%1,',').EXTRACT('//text()') ORDER BY %1).GetClobVal(),',')",[Station] ) it is returning null. But if we use any other function like MIN, MAX, its working.
These are pass through functions. You will want to verify that the source SQL database supports the calls and test them yourself on the SQL server.
What data source are you using? What version of Tableau? and what driver is installed?
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