MERGE

MERGE into GISTIC.ENCUESTAABRIL2018_1 t1

using (SELECT * FROM GISTIC.DOMINIO_CURSO_2020) t2

on (UPPER(t1.CURSO)=UPPER(t2.KEY_ID))

when matched then update set t1.ENABLED_FLAG='N',t1.ATTRIBUTE50='CC 4134',END_DATE_ACTIVE=SYSDATE