just to check for GROUP by bug

drop table if exists t1;

create table t1 (One int unsigned, Two int unsigned, Three int unsigned, Four int unsigned);

insert into t1 values (1,2,1,4);

insert into t1 values (1,2,2,4);

insert into t1 values (1,2,3,4);

insert into t1 values (1,2,4,4);

insert into t1 values (1,1,1,4);

insert into t1 values (1,1,2,4);

insert into t1 values (1,1,3,4);

insert into t1 values (1,1,4,4);

insert into t1 values (1,3,1,4);

insert into t1 values (1,3,2,4);

insert into t1 values (1,3,3,4);

insert into t1 values (1,3,4,4);

select One, Two, sum(Four) from t1 group by One,Two;

drop table if exists t1;