[Firebird-website] Convertin DATE_SUB(NOW(), INTERVAL nauvodni DAY)

[Pepa C. <pep...@se...>]

... WHERE vznik >=3D DATE_SUB(NOW(), INTERVAL nauvodni DAY)

Please can anybody help me to replace this  expression from MySQL to FB =
equivalent?

I cant find usable documentation of possible functions of FB to help =
myself alone.

Thanks to all answers
Pepa.