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;