hbase shell学习-2

糖化外壳学习-2

一个学生成绩表的例子来演示hbase的用法。

name

grade

course

math

英语

汤姆（男子名)

5

97

87

吉姆（人名)

四

89

80

表的创建：语法：create '表名称','列簇名称1','列簇名称2'........

创建"学生"、"姓名"、"年级"、"课程"

desc "学生"

结果：

{

名称='课程，

数据块编码='无，

BLOOMFILTER='ROW '，

REPLICATION_SCOPE='0 '，

VERSIONS="1 "，

压缩='NONE '，

MIN_VERSIONS='0 '，

TTL='永久，

KEEP_DELETED_CELLS='FALSE '，

BLOCKSIZE='65536 '，

IN_MEMORY='false '，

BLOCKCACHE='true '

}{

名称='等级，

数据块编码='无，

BLOOMFILTER='ROW '，

REPLICATION_SCOPE='0 '，

VERSIONS="1 "，

压缩='NONE '，

MIN_VERSIONS='0 '，

TTL='永久，

KEEP_DELETED_CELLS='FALSE '，

BLOCKSIZE='65536 '，

IN_MEMORY='false '，

BLOCKCACHE='true '

}{

名称='名称，

数据块编码='无，

BLOOMFILTER='ROW '，

REPLICATION_SCOPE='0 '，

VERSIONS="1 "，

压缩='NONE '，

MIN_VERSIONS='0 '，

TTL='永久，

KEEP_DELETED_CELLS='FALSE '，

BLOCKSIZE='65536 '，

IN_MEMORY='false '，

BLOCKCACHE='true '

}

新增列簇：

改变表名称，名称='列簇名称'

hbase(主):068:0更改"学生"，NAME="年龄"

用新模式更新所有区域.

更新了1/1个区域。

删除列簇：

改变表名称，名称='列簇名称，方法='删除'

更改"学生",名称="测试",方法="删除"

删除一个表：之前，必须先将该表使残废掉。

禁用"学生"

放弃"学生"

给表添加记录：

"放"表名称，' rowkey '，'列簇名称：列名称','值'

放'学生'、'001201509011001'、'姓名'、'汤姆'

结果：

hbase(主):085:0扫描"学生"

行列单元格

001201509011001

column=name:, timestamp=1447766388162, value=Tom
1 row(s) in 0.0090 seconds

继续执行：name列簇的value='jim'，但是rowkey 不变，

hbase(main):086:0 put 'student','001201509011001','name','Jim'

结果还是一条数据，001201509011001的rowkey，被第二条数据覆盖。

scan 'student'
ROW                           COLUMN+CELL
 001201509011001              column=name:, timestamp=1447766492893, value=Jim

put 'student','001201509011001','course:math','100'
put 'student','001201509011001','course:english','100'

hbase(main):096:0 scan 'student'
ROW                           COLUMN+CELL
 001201509011001              column=course:english, timestamp=1447766828720, value=100
 001201509011001              column=course:math, timestamp=1447766813289, value=100
 001201509011001              column=grade:, timestamp=1447766751652, value=2
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=name:, timestamp=1447766547713, value=Tom

加了很多rowKey进行测试：如下

base(main):127:0 scan 'student'
ROW                           COLUMN+CELL
 001201509011001              column=course:english, timestamp=1447766828720, value=100
 001201509011001              column=course:math, timestamp=1447766813289, value=100
 001201509011001              column=grade:, timestamp=1447766751652, value=2
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=course:english, timestamp=1447766987607, value=95
 001201509011002              column=course:math, timestamp=1447767003501, value=80
 001201509011002              column=grade:, timestamp=1447767073299, value=6
 001201509011002              column=name:, timestamp=1447766547713, value=Tom
 001201509011003              column=grade:, timestamp=1447767130750, value=5
 001201509011004              column=grade:, timestamp=1447767139371, value=3
 001201509011005              column=grade:, timestamp=1447767146338, value=3
 001201509011006              column=course:math, timestamp=1447767489278, value=30
 001201509011006              column=grade:, timestamp=1447767153088, value=2
 001201509011007              column=course:math, timestamp=1447767474245, value=87
 001201509011007              column=grade:, timestamp=1447767173296, value=2
 001201509011008              column=grade:, timestamp=1447767181639, value=3
 001201509011008              column=name:, timestamp=1447767278902, value=lucy
 001201509011009              column=grade:, timestamp=1447767190450, value=10
 001201509011009              column=name:, timestamp=1447767257259, value=Mike
 001201509011010              column=grade:, timestamp=1447767198644, value=11
 001201509011010              column=name:, timestamp=1447767236548, value=Peter

根据rowkey查看对应列的数据：

get '表名称'，'rowkey','列簇名称:列名称'

 get 'student','001201509011001','name'

COLUMN                        CELL
 name:                        timestamp=1447766492893, value=Jim

查看表中的记录数：根据列簇来统计：

hbase(main):133:0* count 'student'

结果：10

查询表中指定列的所有记录：

语法：scan '表名',{COLUMNS ='列簇'}

hbase(main):134:0 scan 'student',{COLUMNS='name'}

ROW                           COLUMN+CELL
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=name:, timestamp=1447766547713, value=Tom
 001201509011008              column=name:, timestamp=1447767278902, value=lucy
 001201509011009              column=name:, timestamp=1447767257259, value=Mike
 001201509011010              column=name:, timestamp=1447767236548, value=Peter

hbase(main):135:0 scan 'student',{COLUMNS='grade'}
ROW                           COLUMN+CELL
 001201509011001              column=grade:, timestamp=1447766751652, value=2
 001201509011002              column=grade:, timestamp=1447767073299, value=6
 001201509011003              column=grade:, timestamp=1447767130750, value=5
 001201509011004              column=grade:, timestamp=1447767139371, value=3
 001201509011005              column=grade:, timestamp=1447767146338, value=3
 001201509011006              column=grade:, timestamp=1447767153088, value=2
 001201509011007              column=grade:, timestamp=1447767173296, value=2
 001201509011008              column=grade:, timestamp=1447767181639, value=3
 001201509011009              column=grade:, timestamp=1447767190450, value=10
 001201509011010              column=grade:, timestamp=1447767198644, value=11
10 row(s) in 0.0220 seconds

hbase(main):136:0 scan 'student',{COLUMNS='course'}
ROW                           COLUMN+CELL
 001201509011001              column=course:english, timestamp=1447766828720, value=100
 001201509011001              column=course:math, timestamp=1447766813289, value=100
 001201509011002              column=course:english, timestamp=1447766987607, value=95
 001201509011002              column=course:math, timestamp=1447767003501, value=80
 001201509011006              column=course:math, timestamp=1447767489278, value=30
 001201509011007              column=course:math, timestamp=1447767474245, value=87
4 row(s) in 0.0130 seconds

查询表中指定区间的所有记录数：

也可以指定一些修饰词：TIMERANGE, FILTER, LIMIT, STARTROW, STOPROW, TIMESTAMP, MAXLENGTH,or COLUMNS。没任何修饰词，就是上边例句，就会显示所有数据行。

语法：scan '表名',{COLUMNS ='列簇',LIMIT =记录数,STARTROW='开始rowkey',STOPROW='结束rowkey'}

取出name列族，前3条记录

hbase(main):012:0 scan 'student',{COLUMNS=['name'],LIMIT=3}
ROW                           COLUMN+CELL
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=name:, timestamp=1447766547713, value=Tom
 001201509011008              column=name:, timestamp=1447767278902, value=lucy

取出name列族，前3条记录 rowkey[001201509011001,001201509011008) 左边闭合，右边开的数据。

hbase(main):014:0 scan 'student',{COLUMNS=['name'],LIMIT=3,STARTROW='001201509011001',STOPROW='001201509011008'}
ROW                           COLUMN+CELL
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=name:, timestamp=1447766547713, value=Tom

指定两列：name，grade

hbase(main):018:0 scan 'student',{COLUMNS=['name','grade'],STARTROW='001201509011001',STOPROW='001201509011010'}

ROW                           COLUMN+CELL
 001201509011001              column=grade:, timestamp=1447766751652, value=2
 001201509011001              column=name:, timestamp=1447766492893, value=Jim
 001201509011002              column=grade:, timestamp=1447767073299, value=6
 001201509011002              column=name:, timestamp=1447766547713, value=Tom
 001201509011003              column=grade:, timestamp=1447767130750, value=5
 001201509011004              column=grade:, timestamp=1447767139371, value=3
 001201509011005              column=grade:, timestamp=1447767146338, value=3
 001201509011006              column=grade:, timestamp=1447767153088, value=2
 001201509011007              column=grade:, timestamp=1447767173296, value=2
 001201509011008              column=grade:, timestamp=1447767181639, value=3
 001201509011008              column=name:, timestamp=1447767278902, value=lucy
 001201509011009              column=grade:, timestamp=1447767190450, value=10
 001201509011009              column=name:, timestamp=1447767257259, value=Mike

可以根据 TIMERANGE查询：

hbase(main):020:0 scan 'student',{COLUMNS=['grade'],LIMIT = 3,TIMERANGE=[1447766751652,1447767257259]}

ROW                           COLUMN+CELL
 001201509011001              column=grade:, timestamp=1447766751652, value=2
 001201509011002              column=grade:, timestamp=1447767073299, value=6
 001201509011003              column=grade:, timestamp=1447767130750, value=5

删除数据：

rowkey=001201509011002的数据有4列

hbase(main):024:0 get 'student','001201509011002'
COLUMN                        CELL
 course:english               timestamp=1447766987607, value=95
 course:math                  timestamp=1447767003501, value=80
 grade:                       timestamp=1447767073299, value=6
 name:                        timestamp=1447766547713, value=Tom

删除一行数据：

hbase(main):027:0 delete 'student','001201509011002','grade'

hbase(main):028:0 get 'student','001201509011002'
COLUMN                        CELL
 course:english               timestamp=1447766987607, value=95
 course:math                  timestamp=1447767003501, value=80
 name:                        timestamp=1447766547713, value=Tom

查看那一行的数据：发现没有了。

hbase(main):033:0 scan 'student',{COLUMNS=['grade'],STARTROW='001201509011002',STOPROW='001201509011003'}
ROW                           COLUMN+CELL
0 row(s) in 0.0080 seconds

http://www.cnblogs.com/ggjucheng/p/3379607.html 参考：HBase shell的基本用法

http://blog.csdn.net/u010967382/article/category/2387735参考HBase基本数据操作详解【完整版，绝对精品】