1 insert into t1(data,num) values('first table', 'hey');

     2 insert into t1(data,num) values('first table', 'pio');  

     3 insert into t2(data,num) values('second table', 2); 

     4 insert into t3(data,num) values('third table', 3); 

     5 insert into t4(data,num) values('fourth table', 4); 

     6 insert into t1(data,num) values('first table', 1); 

     7 insert into t2(data,num) values('second table', 22); 

     8 insert into t4(data,num,timeEnter) values('fourth table...', 22, 3); 

     9 alter table t1 add City num;