Hbase shell 常用命令
下面我们看看HBase Shell的一些基本操作命令，我列出了几个常用的HBase Shell命令，如下：名称
命令表达式
创建表
create '表名称', '列名称1','列名称2','列名称N'
添加记录
put '表名称', '行名称', '列名称:', '值'
查看记录
get '表名称', '行名称'
查看表中的记录总数
count'表名称'
删除记录
delete'表名' ,'行名称' , '列名称'
删除一张表
先要屏蔽该表，才能对该表进行删除，第一步 disable '表名称' 第二步drop '表名称'
查看所有记录
scan "表名称"
查看某个表某个列中所有数据
scan "表名称" , ['列名称:']
更新记录
就是重写一遍进行覆盖
下面是一些常见命令的说明，在hbaseshell中输入help的帮助信息，在本文中，我们先介绍前3个，后面2个，将在下一篇博文中介绍。
COMMAND GROUPS:
Group name: general
Commands: status, version
Group name: ddl
Commands:> Group name: dml
Commands: count, delete, deleteall,get,get_counter, incr, put, scan, truncate
Group name: tools
Commands: assign, balance_switch,balancer,close_region, compact, flush, major_compact, move, split, unassign,zk_dump
Group name: replication
Commands: add_peer,disable_peer,enable_peer, remove_peer, start_replication, stop_replication
一、一般操作
1.查询服务器状态
hbase(main):024:0>status
3 servers, 0 dead,1.0000 average load
2.查询hive版本
hbase(main):025:0>version
0.90.4, r1150278,Sun Jul 24 15:53:29 PDT2011
二、DDL操作
1.创建一个表
hbase(main):011:0>create'member','member_id','address','info'
0 row(s) in 1.2210seconds
2.获得表的描述
hbase(main):012:0>list
TABLE
member
1 row(s) in 0.0160seconds
hbase(main):006:0>describe 'member'
DESCRIPTION ENABLED
{NAME => 'member', FAMILIES =>[{NAME=> 'address', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',true
VERSIONS => '3', COMPRESSION=> 'NONE',TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>'fa
lse', BLOCKCACHE => 'true'}, {NAME=>'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',VERSI
ONS => '3', COMPRESSION =>'NONE', TTL=> '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>'false',
BLOCKCACHE =>'true'}]}
1 row(s) in 0.0230seconds
3.删除一个列族，alter，disable，enable
我们之前建了3个列族，但是发现member_id这个列族是多余的，因为他就是主键，所以我们要将其删除。
hbase(main):003:0>alter'member',{NAME=>'member_id',METHOD=>'delete'}
ERROR: Table memberis enabled. Disable itfirst before> 报错，删除列族的时候必须先将表给disable掉。
hbase(main):004:0>disable'member'
0 row(s) in 2.0390seconds
hbase(main):005:0>alter'member',{NAME=>'member_id',METHOD=>'delete'}
0 row(s) in 0.0560seconds
hbase(main):006:0>describe 'member'
DESCRIPTION ENABLED
{NAME => 'member', FAMILIES =>[{NAME=> 'address', BLOOMFILTER => 'NONE', REPLICATION_SCOPE =>'0',false
VERSIONS => '3', COMPRESSION=> 'NONE',TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>'fa
lse', BLOCKCACHE => 'true'}, {NAME=>'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',VERSI
ONS => '3', COMPRESSION =>'NONE', TTL=> '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>'false',
BLOCKCACHE =>'true'}]}
1 row(s) in 0.0230seconds
该列族已经删除，我们继续将表enable
hbase(main):008:0> enable'member'
0 row(s) in 2.0420seconds
4.列出所有的表
hbase(main):028:0>list
TABLE
member
temp_table
2 row(s) in 0.0150seconds
5.drop一个表
hbase(main):029:0>disable 'temp_table'
0 row(s) in 2.0590seconds
hbase(main):030:0>drop 'temp_table'
0 row(s) in 1.1070seconds
6.查询表是否存在
hbase(main):021:0>exists 'member'
Table memberdoesexist
0 row(s) in 0.1610seconds
7.判断表是否enable
hbase(main):034:0>is_enabled 'member'
true
0 row(s) in 0.0110seconds
8.判断表是否disable
hbase(main):032:0>is_disabled 'member'
false
0 row(s) in 0.0110seconds
三、DML操作
1.插入几条记录
put'member','scutshuxue','info:age','24'
put'member','scutshuxue','info:birthday','1987-06-17'
put'member','scutshuxue','info:company','alibaba'
put'member','scutshuxue','address:contry','china'
put'member','scutshuxue','address:province','zhejiang'
put'member','scutshuxue','address:city','hangzhou'
put'member','xiaofeng','info:birthday','1987-4-17'
put'member','xiaofeng','info:favorite','movie'
put'member','xiaofeng','info:company','alibaba'
put'member','xiaofeng','address:contry','china'
put'member','xiaofeng','address:province','guangdong'
put'member','xiaofeng','address:city','jieyang'
put'member','xiaofeng','address:town','xianqiao'
2.获取一条数据
获取一个id的所有数据
hbase(main):001:0>get'member','scutshuxue'
COLUMN CELL
address:city timestamp=1321586240244,value=hangzhou
address:contry timestamp=1321586239126,value=china
address:province timestamp=1321586239197,value=zhejiang
info:age timestamp=1321586238965,value=24
info:birthday timestamp=1321586239015,value=1987-06-17
info:company timestamp=1321586239071,value=alibaba
6 row(s) in 0.4720seconds
获取一个id，一个列族的所有数据
hbase(main):002:0>get'member','scutshuxue','info'
COLUMN CELL
info:age timestamp=1321586238965,value=24
info:birthday timestamp=1321586239015,value=1987-06-17
info:company timestamp=1321586239071,value=alibaba
3 row(s) in 0.0210seconds
获取一个id，一个列族中一个列的所有数据
hbase(main):002:0>get'member','scutshuxue','info:age'
COLUMN CELL
info:age timestamp=1321586238965,value=24
1 row(s) in 0.0320seconds
6.更新一条记录
将scutshuxue的年龄改成99
hbase(main):004:0>put'member','scutshuxue','info:age' ,'99'
0 row(s) in 0.0210seconds
hbase(main):005:0>get'member','scutshuxue','info:age'
COLUMN CELL
info:age timestamp=1321586571843,value=99
1 row(s) in 0.0180seconds
3.通过timestamp来获取两个版本的数据
hbase(main):010:0>get'member','scutshuxue',{COLUMN=>'info:age',TIMESTAMP=>1321586238965}
COLUMN CELL
info:age timestamp=1321586238965,value=24
1 row(s) in 0.0140seconds
hbase(main):011:0>get'member','scutshuxue',{COLUMN=>'info:age',TIMESTAMP=>1321586571843}
COLUMN CELL
info:age timestamp=1321586571843,value=99
1 row(s) in 0.0180seconds
4.全表扫描：
hbase(main):013:0>scan 'member'
ROW COLUMN+CELL
scutshuxue column=address:city,timestamp=1321586240244, value=hangzhou
scutshuxue column=address:contry,timestamp=1321586239126, value=china
scutshuxue column=address:province,timestamp=1321586239197,value=zhejiang
scutshuxue column=info:age,timestamp=1321586571843, value=99
scutshuxue column=info:birthday,timestamp=1321586239015, value=1987-06-17
scutshuxue column=info:company,timestamp=1321586239071, value=alibaba
temp column=info:age,timestamp=1321589609775,value=59
xiaofeng column=address:city,timestamp=1321586248400,value=jieyang
xiaofeng column=address:contry,timestamp=1321586248316, value=china
xiaofeng column=address:province,timestamp=1321586248355, value=guangdong
xiaofeng column=address:town,timestamp=1321586249564,value=xianqiao
xiaofeng column=info:birthday,timestamp=1321586248202, value=1987-4-17
xiaofeng column=info:company,timestamp=1321586248277,value=alibaba
xiaofeng column=info:favorite,timestamp=1321586248241, value=movie
3 row(s) in 0.0570seconds
5.删除id为temp的值的‘info:age’字段
hbase(main):016:0>delete'member','temp','info:age'
0 row(s) in 0.0150seconds
hbase(main):018:0>get 'member','temp'
COLUMN CELL
0 row(s) in 0.0150seconds
6.删除整行
hbase(main):001:0>deleteall'member','xiaofeng'
0 row(s) in 0.3990seconds
7.查询表中有多少行：
hbase(main):019:0>count'member'
2 row(s) in 0.0160seconds
8.给‘xiaofeng’这个id增加'info:age'字段，并使用counter实现递增
hbase(main):057:0*incr'member','xiaofeng','info:age'
COUNTER VALUE = 1
hbase(main):058:0>get 'member','xiaofeng','info:age'
COLUMN CELL
info:age timestamp=1321590997648,value=\x00\x00\x00\x00\x00\x00\x00\x01
1 row(s) in 0.0140seconds
hbase(main):059:0>incr'member','xiaofeng','info:age'
COUNTER VALUE = 2
hbase(main):060:0>get'member','xiaofeng','info:age'
COLUMN CELL
info:age timestamp=1321591025110,value=\x00\x00\x00\x00\x00\x00\x00\x02
1 row(s) in 0.0160seconds
获取当前count的值
hbase(main):069:0>get_counter'member','xiaofeng','info:age'
COUNTER VALUE = 2
9.将整张表清空：
hbase(main):035:0>truncate 'member'
Truncating 'member'table (it may take awhile):
- Disabling table...
- Dropping table...
- Creating table...
0 row(s) in 4.3430seconds
可以看出，hbase是先将掉disable掉，然后drop掉后重建表来实现truncate的功能的。
页:
[1]