Hi!

As far as I know, there is no builtin support for STDDEV in firebird
1.5. Im I right?

If yes, can you recommend some udf with statistical functions.
I tried one del_stat.dll (got it from http://hlubocky.del.cz/udf/)
but this crashed the server from time to time with some "domain
error" related with "sqrt" function.

thanks in advance!

Aivar