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  • 《Hbase基本操作》

    [root@slave1 local]#hbase shell #进入HBase客户端命令行

    hbase(main):024:0> list [列出HBase的所有表]

    [创建表]

    # 创建表t1,有两个family name:f1,f2,且版本数均为2
    create 't1',{NAME => 'f1', VERSIONS => 2},{NAME => 'f2', VERSIONS => 2}
    create 'test','cf' [test为表名,cf为列族]
    create 'test1','cf1','cf2'
    create 'student','info'

    [查看表结构]

    echo "describe 'student'"|hbase shell
    describe 'student'

    [插入数据到表]

    hbase(main):003:0> put 'student','1001','info:sex','male'
    hbase(main):004:0> put 'student','1001','info:age','18'
    hbase(main):005:0> put 'student','1002','info:name','Janna'
    hbase(main):006:0> put 'student','1002','info:sex','female'
    hbase(main):007:0> put 'student','1002','info:age','20'

    [扫描查看表数据]

    hbase(main):008:0> scan 'student'
    hbase(main):009:0> scan 'student',{STARTROW => '1001', STOPROW => '1001'}
    hbase(main):010:0> scan 'student',{STARTROW => '1001'}
    hbase(main):201:0> scan 'student',{STARTROW=>'1',LIMIT=>1}
    hbase(main):124:0> scan 'student',{LIMIT=>2} #扫描表student的前5条数据

    [更新指定字段的数据]

    hbase(main):012:0> put 'student','1001','info:name','Nick'
    hbase(main):013:0> put 'student','1001','info:age','100'

    [查看[指定行”或“指定列族:列]的数据]
    echo "get 'boye:test','10001','info:name'"|hbase shell
    hbase(main):014:0> get 'student','1001'
    hbase(main):015:0> get 'student','1001','info:name'
    hbase(main):080:0> get 'student','1001','info:age','info:sex'

    [删除数据]

    hbase(main):016:0> deleteall 'student','1001' #删除某rowkey的全部数据
    hbase(main):017:0> delete 'student','1002','info:sex' #删除某rowkey的某一列数据

    [删除表]

    分两步:首先disable,然后drop
    hbase(main):019:0> disable 'student'
    hbase(main):020:0> drop 'student'

    [清空表数据]

    hbase(main):018:0> truncate 'student'
    提示:清空表的操作顺序为先disable,然后再truncate

    [变更表信息]

    将info列族中的数据存放3个版本:
    hbase(main):022:0> alter 'student',{NAME=>'info',VERSIONS=>3}
    hbase(main):132:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>1}

    [命名空间]

    hbase(main):132:0> list_namespace #查看命名空间
    hbase(main):132:0> create_namespace 'boye' #创建命名空间
    hbase(main):132:0> create 'boye:test','info','detail' #指定命名空间创建表

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  • 原文地址:https://www.cnblogs.com/boye169/p/13418154.html
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