Would it be an option to have a pre-decoder stage in SQLite, that would reduce the workarounding to manage 'stddev' and 'variables' ? - standard deviation: . "stdev(x)" math function is manually workarounded by replacing it by "sqrt((sum(x * x) -2* sum(x) * avg(x) + avg(x) * avg(x) * count( * ))/count( * ))" - "variables": methods like the one describe in Stackoverflow seems also to be a candidate for a pre-decoder https://stackoverflow.com/questions/7739444/declare-variable-in-sqlite-and-use-it/14574227#14574227 Sorry if this suggestion has already been made 42 times.