hbase练习题

-- 配置环境变量,因为在hbase中有的地方可能用到了环境变量
-- bin/start-hbase.sh
-- bin/hbase shell
-- 访问http://mini0:16010/ 可以看浏览器页面

名称    命令表达式
查看所有表    list
list

创建表    create '表名', '列族名1','列族名2','列族名N'
create 'www.qq.com20170630','movie','music','games'
create 'www.baidu.com20170630','search','games'

描述表    describe  ‘表名’
describe 'www.baidu.com20170630'
判断表存在    exists  '表名'
exists 'www.baidu.com20170630'

判断是否禁用启用表    is_enabled '表名'
is_disabled ‘表名’
is_disabled 'www.baidu.com20170630'

添加记录          put  ‘表名’, ‘rowKey’, ‘列族 : 列‘  ,  '值'
-- 好像不能添加多了列族:列
put 'www.baidu.com20170630','rowkey123','games:usercount','12'
put 'www.baidu.com20170630','rowkey123','search:bagua','huang xiao ming'
put 'www.baidu.com20170630','rowkey1236','games:usercount','200'
put 'www.baidu.com20170630','rowkey1234','search:bagua','hxm'
put 'www.baidu.com20170630','rowkey1234','games:usercount','12'
put 'www.baidu.com20170630','rowkey1234','search:bagua','210'
put 'www.baidu.com20170630','rowkey1234','games:usercount','200'
put 'www.baidu.com20170630','rowkey1234','search:bagua','hxm'
put 'www.qq.com20170630','rowkey123','movie:dhxy','zxc' 
put 'www.qq.com20170630','rowkey123','music:singer' 
put 'www.qq.com20170630','rowkey123', 'movie:dhxy','zxc 
put 'www.qq.com20170630','rowkey1231','games:usercount','100' 
put 'www.qq.com20170630','rowkey1231','music:singer','chenyixun' 

查看记录rowkey下的所有数据    get  '表名' , 'rowKey'

get 'www.baidu.com20170630','rowkey123'
get 'www.qq.com20170630','rowkey1232'
get 'www.baidu.com20170630','rowkey1234'

查看表中的记录总数    count  '表名'
count 'www.qq.com20170630'
count 'www.qq.com20170630'

获取某个列族    get '表名','rowkey' 
get 'www.qq.com20170630','rowkey123'
get 'www.baidu.com20170630','rowkey123','games'
获取某个列族的某个列    get '表名','rowkey','列族：列’
get 'www.baidu.com20170630','rowkey123','games:usercount'

获取某个列族的某几个列

get 't02' 'rowkey',{COLUMN=>['liezu:lieming','liezu:lieming']}

删除记录    delete  ‘表名’ ,‘行名’ , ‘列族：列'
delete 'www.qq.com20170630','rowkey123','movie:dhxy'
删除整行    deleteall '表名','rowkey'
deleteall 'www.qq.com20170630','rowkey123' 
删除一张表    先要屏蔽该表，才能对该表进行删除
第一步 disable ‘表名’ ，
disable 'www.baidu.com20170630'
第二步  drop '表名'
drop 'www.baidu.com20170630'
清空表    truncate '表名'
truncate 'www.qq.com20170630'
查看所有记录    scan "表名"  
scan 'www.qq.com20170630'
scan 'www.baidu.com20170630'
查看某个表某个列中所有数据    scan "表名" , {COLUMNS=>'列族名:列名'}
 
更新记录     就是重写一遍，进行覆盖，hbase没有修改，都是追加
put 'www.qq.com20170630','rowkey1231','music:singer','fanweiqi','movie:hjzc','wt'