Hbase命令
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bin/hbase shell
HBase Shell; enter 'help' for list of supported commands.
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Version 0.92.1, r1298924, Fri Mar 9 16:58:34 UTC 2012./hbase shell
1.查看服务器状态
hbase(main):001:0> status
1 servers, 0 dead, 3.0000 average load
2.查看hbase版本
hbase(main):002:0> version
0.92.1, r1298924, Fri Mar 9 16:58:34 UTC 2012
关于命名空间的命令：
1. 创建
2. 删除
3. 修改
显示命名空间：
3.DDL操作
1).create命令
创建一个具有三个列簇"member_id"、"address"和"info"的表"member"，其中表名、行和列都要用单引号括起来，并以逗号隔开。
hbase(main):003:0> create 'member','member_id','address','info'
0 row(s) in 1.1770 seconds
2).list命令
查看当前HBase中都有哪些表
hbase(main):004:0> list
TABLE
member
test
2 row(s) in 0.0170 seconds
3).describe 命令
查看表的描述信息
hbase(main):006:0> describe 'member'
DESCRIPTION ENABLED
{NAME => 'member', FAMILIES => [{NAME => 'address', BLOOMFILTER => 'NONE', REPLICATION_SCO true PE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}, {NAME => 'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}, {NAME => 'member_id', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE =>'65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}
1 row(s) in 0.0320 seconds
4).删除一个列簇：disable，alter，enable
注意：修改表结构必须先disable
hbase(main):004:0> disable member
NameError: undefined local variable or method `member' for #
hbase(main):005:0> disable 'member'
0 row(s) in 2.1560 seconds
删除member表的info列簇
hbase(main):006:0> alter 'member', 'delete' => 'info'
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 1.3370 seconds
记得enable表(disable：使表无效；enable：使表有效)
hbase(main):009:0> enable 'member'
0 row(s) in 2.2330 seconds
5).删除一个表test（disable，drop）
hbase(main):025:0> disable 'test'
0 row(s) in 2.2100 seconds
hbase(main):026:0> drop 'test'
0 row(s) in 1.2350 seconds
6).查询表是否存在
hbase(main):033:0> exists 'test'
Table test does not exist
0 row(s) in 0.1820 seconds
7).查看表是否enable
hbase(main):032:0> is_enabled 'member'
true
0 row(s) in 0.0070 seconds
2.DML操作
1).插入数据
hbase(main):005:0> put 'member','scutshuxue','info:age','24'
0 row(s) in 0.0790 seconds
hbase(main):005:0> put 'member','duansf','info:age','37'
0 row(s) in 0.0790 seconds
hbase(main):001:0> put 'member','scutshuxue','info:company','alibaba'
0 row(s) in 0.6520 seconds
hbase(main):002:0> put 'member','xiaofeng','address:contry','china'
0 row(s) in 0.0090 seconds
hbase(main):007:0> put 'member','xiaofeng','info:birthday','1987-4-17'
0 row(s) in 0.0120 seconds
注：插入语句后面一定不要有空格。
2).获取一条数据
hbase(main):012:0> get 'member','xiaofeng'
COLUMN CELL
address:contry timestamp=1488307463293, value=china
info:birthday timestamp=1488307533852, value=1987-4-17
2 row(s) in 0.0130 seconds
3).获取一条记录中某个列簇的信息
hbase(main):013:0> get 'member','xiaofeng','info'
COLUMN CELL
info:birthday timestamp=1488307533852, value=1987-4-17
1 row(s) in 0.0100 seconds
4).获取一条记录的某个列簇中的某个列的信息
hbase(main):020:0> get 'member','xiaofeng','info:birthday'
COLUMN CELL
info:birthday timestamp=1488307533852, value=1987-4-17
1 row(s) in 0.0090 seconds
5).更新一条记录
把duansf的年龄改为38岁
hbase(main):022:0>get 'member','duansf','info:age'
COLUMN CELL
info:age timestamp=1488308172957, value=37
1 row(s) in 0.0090 seconds
hbase(main):022:0>put 'member','duansf','info:age','38'
6).删除member表中某个列
hbase(main):032:0* delete 'member','scutshuxue','info:age'
0 row(s) in 0.0080 seconds
7).member表全表扫描(类似于关系型数据库select *)
hbase(main):002:0> scan 'member'
ROW COLUMN+CELL
scutshuxue column=info:age, timestamp=1488306890710, value=24
scutshuxue column=info:company, timestamp=1488307003752, value=alibaba
xiaofeng column=address:contry, timestamp=1488307463293, value=china
xiaofeng column=info:birthday, timestamp=1488307533852, value=1987-4-17
2 row(s) in 0.9780 seconds
8).删除整行 deleteall
hbase(main):036:0> deleteall 'member','scutshuxue'
0 row(s) in 0.0090 seconds
9).查询表中有多少行count
hbase(main):041:0> count 'member'
2 row(s) in 0.0240 seconds
10).清空整张表truncate
hbase(main):045:0>truncate 'member'
Truncating 'member' table (it may take a while):
- Disabling table...
- Dropping table...
- Creating table...
0 row(s) in 4.8640 seconds
