HBase Shell 基本操作
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进入HBase客户端命令行
bin/hbase shell
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查看帮助命令
hbase(main):001:0> help
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查看当前数据库中有哪些表
hbase(main):001:0> list
表的操作
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创建表
hbase(main):002:0> create 'student','info'
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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'
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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'}
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查看表结构
hbase(main):011:0> describe ‘student’
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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'
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查看“指定行”或“指定列族:列”的数据
hbase(main):014:0> get 'student','1001' hbase(main):015:0> get 'student','1001','info:name'
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统计表数据行数
hbase(main):021:0> count 'student'
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删除数据
删除某rowkey的全部数据: hbase(main):016:0> deleteall 'student','1001' 删除某rowkey的某一列数据: hbase(main):017:0> delete 'student','1002','info:sex'
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清空表数据
首先需要先让该表为disable状态: hbase(main):019:0> disable 'student' hbase(main):018:0> truncate 'student' 提示:清空表的操作顺序为先disable,然后再truncate。
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删除表
首先需要先让该表为disable状态: hbase(main):019:0> disable 'student' 然后才能drop这个表: hbase(main):020:0> drop 'student' 提示:如果直接drop表,会报错:ERROR: Table student is enabled. Disable it first.
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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):022:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>3