这是我转载的一篇文章,所有命令都亲测有效,我稍微修改了一部分
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', '列族名称1','列族名称2','列族名称N'
添加记录
put '表名称', '行名称', '列族名称: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' , '列族名称'
delete '表名' ,'行名称' , '列族名称: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" , ['列族名称: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: alter, create, describe, disable,drop, enable, exists, is_disabled, is_enabled, list
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
启动hbase shell命令:hbase shell
secureCRT无法后退删除:control+backspace
或者将光标移动到待删除文本前,然后用backspace删除
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 PDT 2011
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
注意表明后面的三个字段都是列族family的名称
2. 获得表信息
describe 'member'
3.删除一个列族,alter,disable,enable
删除列族的时候必须先将表给disable掉。
hbase(main):004:0>disable 'member'
hbase(main):005:0>alter'member',{NAME=>'member_id',METHOD=>'delete'}
hbase(main):006:0>describe 'member'
hbase(main):008:0> enable 'member'
注意alter后面的NAME和METHOD都必须大写
4.列出所有的表
hbase(main):028:0>list
5.drop一个表
hbase(main):029:0>disable 'temp_table'
hbase(main):030:0>drop 'temp_table'
6.查询表是否存在
hbase(main):021:0>exists 'member'
7.判断表是否enable
hbase(main):034:0>is_enabled 'member'
8.判断表是否disable
hbase(main):032:0>is_disabled 'member'
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 a while):
- 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。
---------------------
作者:scutshuxue
来源:CSDN
原文:https://blog.csdn.net/scutshuxue/article/details/6988348
版权声明:本文为博主原创文章,转载请附上博文链接!