SELECT * FROM ACADPROD
WHERE CST_PF_NC='500' AND CST_PJ_SIMPLES= '500'
AND CST_PJ_NORMAL= '500'  AND CST_NCFE='900'


UPDATE ACADPROD SET CST_PF_NC='', CST_PJ_SIMPLES='',
CST_PJ_NORMAL='', CST_NCFE='', CFOP_VENDA='', CFOP_VENDA_FORA=''