根据rowKey查询某个记录

get <table>,<rowkey>,[<family:column>,….]

get ‘User’, ‘row2’

查询所有记录

（1）正序扫描

scan <table>, {COLUMNS => [ <family:column>,…. ], LIMIT => num}

scan ‘User’

（2）倒序扫描

scan ‘table’, {REVERSED => TRUE}

（3）扫描前2条

scan ‘User’, {LIMIT => 2}

（4）范围查询scan ‘User’, {STARTROW => ‘row2’, ENDROW => ‘row2’}