select * from db.devices where devgroup=0;
select * from db.devices where devgroup=10;
select * from db.devices where devgroup=20;
select * from db.devices where devgroup=30;
select * from db.devices where devgroup=40;
select * from db.devices where devgroup=50;
select * from db.devices where devgroup=60;
select * from db.devices where devgroup=70;
select * from db.devices where devgroup=80;
select * from db.devices where devgroup=90;