HBase Shell 工具

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HBase Shell 工具

基本命令

hbase(main):001:0> help

help 'create_namespace' 查看命令的用法

namespace 创建查看描述删除

create_namespace 'ns_name'

list_namespace

describe_namespace 'student'

drop_namespace 'ns_name'

table

创建默认是default的namespacehbase 注意：创建表时必须指定表名及列簇

create 't1', 'f1', 'f2', 'f3'

create 'student:stu_info', 'info'

查看 list

ns_name:tb_name :唯一确定一张表，除默认namespace

描述 desc 'student:stu_info'或describe 'student:stu_info'

删除企业中规范：-》删除时必须先禁用表修改表，先禁用-修改-启用

表的DML

增 rowkey的设计比较重要

put 'ns1:t1', 'r1', 'c1', 'value'

put 'student:stu_info','20161204_1001','info:name','laosi'

put 'student:stu_info','20161204_1001','info:age','18'

put 'student:stu_info','20161204_1001','info:sex','male'

put 'student:stu_info','20161204_1002','info:name','laoer'

put 'student:stu_info','20161204_1002','info:age','20'

put 'student:stu_info','20161204_1003','info:name','laosan'

put 'student:stu_info','20161204_1003','info:age','22'

查 get :查询最快的方式，必须指定rowkey

get 'student:stu_info','20161204_1001'

scan：全局扫描，企业中不常用 scan 'student:stu_info'

scan+ 过滤：企业中最常用的方式，速度仅次于get

scan 'student:stu_info',{STARTROW=>'20161204_1001'}

scan 'student:stu_info',{STARTROW=>'20161204_1001',STOPROW=>'20161204_1002'}

包头不包尾

删

delete 'student:stu_info','20161204_1003','info:name'

deleteall支持按照rowkey删除

改 hbase中没有改的概念

put 'student:stu_info','20161204_1001','info:name','laoda'

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