Hi Nuno, Am 01.03.2014, 14:36 Uhr, schrieb Nuno de Santos Loureiro <nlourei at ualg.pt>: > In one of them I have 's', 'n', 'nc', or NULL. > I need to change 's' by 'yes', 'nc' by 'yes', 'n' by 'no' and NULL by > 'no'. In Field Calculator you could use: CASE WHEN column IN ('s','nc') THEN 'yes' ELSE 'no' END Best wishes, Anita -- anitagraser.com