如何进入Hbase数据库
[root@node127 bin]# hbase shell SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/console/hbase/lib/slf4j-log4j12.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/console/hadoop/hadoop/lib/slf4j-log4j12.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/console/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] HBase Shell Use "help" to get list of supported commands. Use "exit" to quit this interactive shell. For Reference, please visit: http://hbase.apache.org/2.0/book.html#shell Version 2.1.0-cdh6.1.1, rUnknown, Thu Feb 7 22:49:02 PST 2019 Took 0.0036 seconds
一般操作
查询服务器状态
hbase(main):001:0> status 1 active master, 1 backup masters, 3 servers, 0 dead, 1.0000 average load Took 1.3630 seconds
查询当前用户
hbase(main):003:0> whoami
root (auth:SIMPLE)
groups: root
Took 0.0835 seconds
查询当前版本
hbase(main):004:0> version 2.1.0-cdh6.1.1, rUnknown, Thu Feb 7 22:49:02 PST 2019 Took 0.0012 seconds
ddl操作
列出所有命名空间
hbase(main):006:0> list_namespace NAMESPACE default hbase 2 row(s) Took 1.8528 seconds
新建命名空间
hbase(main):007:0> create_namespace 'li_hbase' Took 0.4772 seconds
新建表：li_hbase空间下，表t1，列族cf1
hbase(main):010:0> create 'li_hbase:t1', 'cf1' Created table li_hbase:t1 Took 4.8559 seconds => Hbase::Table - li_hbase:t1 hbase(main):011:0> list TABLE li_hbase:t1 1 row(s) Took 0.0327 seconds => ["li_hbase:t1"]
创建表t2插入数据
hbase(main):022:0> create 'li_hbase:t2', 'cf1' Created table li_hbase:t2 Took 1.4216 seconds => Hbase::Table - li_hbase:t2 hbase(main):023:0> put 'li_hbase:t2','1','cf1:name','孙悟空' Took 0.1548 seconds hbase(main):024:0> put 'li_hbase:t2','1','cf1:sex','男' Took 0.0150 seconds hbase(main):025:0> put 'li_hbase:t2','1','cf1:age','19' Took 0.0117 seconds hbase(main):026:0> put 'li_hbase:t2','2','cf1:name','angela' Took 0.0104 seconds hbase(main):027:0> put 'li_hbase:t1','2','cf1:sex','女' Took 0.0163 seconds hbase(main):028:0> put 'li_hbase:t2','2','cf1:age','19' Took 0.0137 seconds hbase(main):029:0> put 'li_hbase:t2','2','cf1:sex','女' Took 0.0076 seconds
查询数据
汉字为16进制
hbase(main):030:0> scan 'li_hbase:t2'
ROW COLUMN+CELL
1 column=cf1:age, timestamp=1574219211337, value=19
1 column=cf1:name, timestamp=1574219186848, value=\xE5\xAD\x99\xE6
\x82\x9F\xE7\xA9\xBA
1 column=cf1:sex, timestamp=1574219200445, value=\xE7\x94\xB7
2 column=cf1:age, timestamp=1574219269247, value=19
2 column=cf1:name, timestamp=1574219249911, value=angela
2 column=cf1:sex, timestamp=1574219276096, value=\xE5\xA5\xB3
2 row(s)
Took 0.0208 seconds
create：创建数据库表，创建命令可看帮助help 'create'
语法：create <table>, {NAME =><family>, VERSIONS => <VERSIONS>}
例示：create 'product',{NAME => 'computer', VERSIONS => 5},{ NAME => 'food' , VERSIONS => 3}
描述：创建一张名叫'product'数据库表，并且创建两个列族，分别为：'computer'、'food'