Use of WHERE Clause
UPDATE MyIceberg.MyDatabase.Tab1 SET c1='newvalue', c2='newvalue2' WHERE country='France';
Use of ALL Clause
UPDATE MyIceberg.MyDatabase.Tab1 ALL
UPDATE MyIceberg.MyDatabase.Tab1 SET c1='newvalue', c2='newvalue2' WHERE country='France';
UPDATE MyIceberg.MyDatabase.Tab1 ALL