insert into t1(data,num) values('first table', 'hey');
insert into t1(data,num) values('first table', 'pio');  
insert into t2(data,num) values('second table', 2); 
insert into t3(data,num) values('third table', 3); 
insert into t4(data,num) values('fourth table', 4); 
insert into t1(data,num) values('first table', 1); 
insert into t2(data,num) values('second table', 22); 
insert into t4(data,num,timeEnter) values('fourth table...', 22, 3); 
alter table t1 add City num;