每日日报2021 10/13

Hbase的基本操作

1．进入 HBase 客户端命令行

[atguigu@hadoop102 hbase]$ bin/hbase shell

2．查看帮助命令

hbase(main):001:0> help

3．查看当前数据库中有哪些表

hbase(main):002:0> list

2.2.2 表的操作

1．创建表

hbase(main):002:0> create 'student','info'

2．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'

3．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'}

4．查看表结构

hbase(main):011:0> describe ‘student’

5．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'

6．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'

7．统计表数据行数

hbase(main):021:0> count 'student'

8．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：