mysql test single table huge rows

1.

show create table tb2;show create table tb3;

 

 2.desc tb2;desc tb3;

 

 

3.select count(Idx) from tb2; select count(Idx) from tb3;

 

desc tb2;desc tb3;select count(Idx) as tb2Count from tb2;select count(Idx) as tb3Count from tb3;