We've setup a user-defined function in MySQL to support a MEDIAN calculations.
So this returns a valid result:
SELECT MEDIAN(voc) FROM epi_iv_meas WHERE wafer_id=21506
However, trying to select MEDIAN(voc) in Tableau results in an error from Tableau about how MEDIAN is not a valid function.
Is there any way to force Tableau to recognize the MEDIAN function, or just pass it through to the database server?
Have you tried the function rawsql in a calculated field?