tp5 sql查询

$where = [];
$where[]=['snno','>=',$data['start_sn']];
$where[]=['snno','<=',$data['end_sn']];
$res = Db::name('pos')->where($where)->field('id,snno')->select();

区间查询：

ps:数据表包含空格，会导致查询的结果与实际结果不同，注意保证数据表内数据正确。