drop table if exists t1, t2, t3;
create table t1 (c1 int, c2 int);
insert into t1 values (1, 100);
insert into t1 values (2, 101);
insert into t1 values (3, 102);
select * from t1;
c1	c2
1	100
2	101
3	102
update t1 set c2=c2+100 where c1=1;
select * from t1;
c1	c2
1	200
2	101
3	102
update t1 set c2=c2+100 where c1=2;
select * from t1;
c1	c2
1	200
2	201
3	102
update t1 set c2=c2+100 where c1=3;
select * from t1;
c1	c2
1	200
2	201
3	202
flush tables;
update t1 set c1=5, c2=50;
select * from t1;
c1	c2
5	50
5	50
5	50
drop table t1;
