Ver originalSELECT 'Diferencias_new', t1.OPRID, t1.NAMEUSR, t1.ROLNAMEFROM user_new t1WHERE t1.ROLNAME NOT IN (SELECT t2.ROLNAME FROM user_old t2 where t1.nameusr=t2.nameusr) union SELECT 'Diferencias_old', t1.OPRID, t1.NAMEUSR, t1.ROLNAMEFROM user_old t1WHERE t1.ROLNAME NOT IN (SELECT t2.ROLNAME FROM user_new t2 where t1.nameusr=t2.nameusr)