第3章 HBaseShell常用操作

HBaseShell常用操作第3章學(xué)習(xí)目標(biāo)1.掌握HBaseShell操作HBaseContents目錄HBaseShell操作13HBaseShell操作進(jìn)入HBase客戶端命令行hbaseshell0．創(chuàng)建表(create'表名','列族')(HBase建表時(shí)必須加上表名和列族名)hbase(main):001:0>create'test','info'3HBaseShell操作1．查看表(list)hbase(main):002:0>list3HBaseShell操作2．插入數(shù)據(jù)到表(put'表名','rowkey','列族:列名','數(shù)據(jù)')

hbase(main):003:0>put'test','1001','info:name',jhon'hbase(main):004:0>put'test','1001','info:age','18'hbase(main):005:0>put'test','1002','info:name','Janna'3HBaseShell操作3、查看“指定行”或“指定列族:列”的數(shù)據(jù)(get'表名','rowkey')(get'表名','rowkey','列族:列')hbase(main):006:0>get'test','1001'hbase(main):007:0>get'test','1001','info:name'3HBaseShell操作4．查看表結(jié)構(gòu)(describe)hbase(main):008:0>describe'test'3HBaseShell操作5．修改列族(alter)//修改列族信息，將最大時(shí)間戳版本設(shè)為3hbase(main):009:0>alter'test',{NAME=>'info',VERSIONS=>3}//添加列族info2hbase(main):010:0>alter'test','info2’//刪除列族info2hbase(main):012:0>alter'table','delete'=>'cf2'3HBaseShell操作6．更新指定字段的數(shù)據(jù)并查看(put'表名','rowkey','列族:列名','數(shù)據(jù)')hbase(main):013:0>put'test','1001','info:name','nick'hbase(main):014:0>put'test','1001','info:age','22'hbase(main):016:0>get'test','1001',{COLUMN=>'info:name',VERSIONS=>3}展示出來的歷史時(shí)間戳版本數(shù)據(jù)3HBaseShell操作7．掃描查看表數(shù)據(jù)(scan)//掃描整張表hbase(main):018:0>scan'test'//指定rowkey范圍掃描表hbase(main):019:0>scan'test',{STARTROW=>'1001',STOPROW=>'1001'}hbase(main):020:0>scan'test',{STARTROW=>'1001'}3HBaseShell操作8．統(tǒng)計(jì)表數(shù)據(jù)行數(shù)(count)hbase(main):021:0>count'test'3HBaseShell操作9．刪除數(shù)據(jù)(deleteall，delete)(實(shí)際上數(shù)據(jù)依然存在，只是標(biāo)記不可見，會(huì)被定時(shí)清理）//刪除某rowkey的全部數(shù)據(jù)：hbase(main):022:0>deleteall'test','1001’//刪除某rowkey的某一條數(shù)據(jù)：hbase(main):023:0>delete'test','1002','info:name'3HBaseShell操作10．清空表數(shù)據(jù)(truncate)hbase(main):025:0>truncate'test'3HBaseShell操作11．禁用、啟用、刪除表(disable,enable,exists,drop)(想要?jiǎng)h除表，需要先禁用表)//禁用表hbase(main):030:0>disable'test’//啟用表hbase(main):031:0>enable'test’//查詢表是否存在hbase(main):032:0>exists'test'3H