一般操作
查看服务器状态
status
查看hbase版本
version
DDL操作
创建表
create ‘member‘,‘member_id‘,‘address‘,‘info‘
创建了3个列族，分别是member_id, address, info
知识点回顾：cf是schema的一部分，而column不是。
查看表信息
describe ‘member‘
DESCRIPTION ENABLED
‘member‘, {NAME => ‘address‘, DATA_BLOCK_ENCODING => ‘NONE‘, BLOOMFILTE true
R => ‘ROW‘, REPLICATION_SCOPE => ‘0‘, VERSIONS => ‘1‘, COMPRESSION => ‘
NONE‘, MIN_VERSIONS => ‘0‘, TTL => ‘2147483647‘, KEEP_DELETED_CELLS =>
‘false‘, BLOCKSIZE => ‘65536‘, IN_MEMORY => ‘false‘, BLOCKCACHE => ‘tru
e‘}, {NAME => ‘info‘, DATA_BLOCK_ENCODING => ‘NONE‘, BLOOMFILTER => ‘RO
W‘, REPLICATION_SCOPE => ‘0‘, VERSIONS => ‘1‘, COMPRESSION => ‘NONE‘, M
IN_VERSIONS => ‘0‘, TTL => ‘2147483647‘, KEEP_DELETED_CELLS => ‘false‘,
BLOCKSIZE => ‘65536‘, IN_MEMORY => ‘false‘, BLOCKCACHE => ‘true‘}, {NA
ME => ‘member_id‘, DATA_BLOCK_ENCODING => ‘NONE‘, BLOOMFILTER => ‘ROW‘,
REPLICATION_SCOPE => ‘0‘, VERSIONS => ‘1‘, COMPRESSION => ‘NONE‘, MIN_
VERSIONS => ‘0‘, TTL => ‘2147483647‘, KEEP_DELETED_CELLS => ‘false‘, BL
OCKSIZE => ‘65536‘, IN_MEMORY => ‘false‘, BLOCKCACHE => ‘true‘}
1 row(s) in 0.1800 seconds
查询所有的表
list
删除一个列族
member表建了3个列族，但是发现member_id这个列族是多余的，因为他就是主键，所以我们要将其删除。
alter ‘member‘,‘delete‘=>‘member_id‘
drop表
为了测试drop，先创建一个表
create ‘tmp_table‘,‘info‘
删除表之前需要先将表disable再drop
disable ‘tmp_table‘ drop ‘tmp_table‘
判断表是否enable
is_enabled ‘member‘
判断表是否disabled
is_disabled ‘member‘
DML操作
插入记录
格式：put 表名 row_key cf:column value
put ‘member‘,‘luogankun‘,‘info:age‘,‘27‘ put ‘member‘,‘luogankun‘,‘info:birthday‘,‘1986-09-05‘ put ‘member‘,‘luogankun‘,‘info:company‘,‘asinainfo-linkage‘ put ‘member‘,‘luogankun‘,‘address:country‘,‘china‘ put ‘member‘,‘luogankun‘,‘address:province‘,‘beijing‘ put ‘member‘,‘luogankun‘,‘address:city‘,‘beijing‘ put ‘member‘,‘spring‘,‘info:age‘,‘27‘ put ‘member‘,‘spring‘,‘info:birthday‘,‘1986-05-14‘ put ‘member‘,‘spring‘,‘info:company‘,‘asinainfo-linkage‘ put ‘member‘,‘spring‘,‘address:country‘,‘china‘ put ‘member‘,‘spring‘,‘address:province‘,‘hubei‘ put ‘member‘,‘spring‘,‘address:city‘,‘wuhan‘ put ‘member‘,‘spring‘,‘info:favorite‘,‘shopping‘
知识点回顾： column完全动态扩展，每行可以有不同的columns。
获取一个rowkey的所有数据
格式：get 表名 row_key
get ‘member‘,‘luogankun‘ COLUMN CELL address:city timestamp=1409122962541, value=beijing address:country timestamp=1409122962468, value=china address:province timestamp=1409122962510, value=beijing info:age timestamp=1409122962328, value=27 info:birthday timestamp=1409122962399, value=1986-09-05 info:company timestamp=1409122962434, value=asinainfo-linkage
知识点回顾：htable按rowkey字典序(1,10,100,2)自动排序，每行包含任意数量的columns，columns按照columnkey(address:city,address:country,address:province,info:age,info:birthday,info:company)自动排序。
获取一个id，一个列族的所有数据
格式： get 表名 row_key column
get ‘member‘,‘luogankun‘,‘info‘ COLUMN CELL info:age timestamp=1409122962328, value=27 info:birthday timestamp=1409122962399, value=1986-09-05 info:company timestamp=1409122962434, value=asinainfo-linkage
获取一个id，一个列族中一个列的所有数据
格式：get 表名 row_key cf:column
get ‘member‘,‘luogankun‘,‘info:age‘ COLUMN CELL info:age timestamp=1409122962328, value=27
更新一条记录
格式： put 表名 row_key cf:column value
将luogankun的年龄改成18
put ‘member‘,‘luogankun‘,‘info:age‘,‘18‘ get ‘member‘,‘luogankun‘,‘info:age‘ COLUMN CELL info:age timestamp=1409123175384, value=18
知识点回顾：查询默认返回最新的值。
通过timestamp来获取指定版本的数据
格式： get 表名 row_key {COLUMN=>‘cf:column‘,TIMESTAMP=>xxxxxx}
get ‘member‘,‘luogankun‘,{COLUMN=>‘info:age‘,TIMESTAMP=>1409122962328}
COLUMN CELL
info:age timestamp=1409122962328, value=27
get ‘member‘,‘luogankun‘,{COLUMN=>‘info:age‘,TIMESTAMP=>1409123175384}
COLUMN CELL
info:age timestamp=1409123175384, value=18
知识点回顾：每个column可以有任意数量的values，按timestamp倒序自动排序；tableName+rowkey+column+timestamp==>value
全表扫描
格式：scan 表名
scan ‘member‘ ROW COLUMN+CELL luogankun column=address:city, timestamp=1409122962541, value=beijing luogankun column=address:country, timestamp=1409122962468, value=china luogankun column=address:province, timestamp=1409122962510, value=beijing luogankun column=info:age, timestamp=1409123175384, value=18 luogankun column=info:birthday, timestamp=1409122962399, value=1986-09-05 luogankun column=info:company, timestamp=1409122962434, value=asinainfo-linkage spring column=address:city, timestamp=1409122962828, value=wuhan spring column=address:country, timestamp=1409122962754, value=china spring column=address:province, timestamp=1409122962787, value=hubei spring column=info:age, timestamp=1409122962592, value=27 spring column=info:birthday, timestamp=1409122962623, value=1986-05-14 spring column=info:company, timestamp=1409122962670, value=asinainfo-linkage spring column=info:favorite, timestamp=1409122963494, value=shopping
删除id为spring的值的‘info:age‘字段
格式：delete 表名 row_key cf:column
先查看
get ‘member‘,‘spring‘,‘info:age‘ COLUMN CELL info:age timestamp=1409122962592, value=27
再删除
delete ‘member‘,‘spring‘,‘info:age‘
再查看对比是否已经删除
get ‘member‘,‘spring‘,‘info:age‘ COLUMN CELL 0 row(s)
查询表中有多少行
格式：count 表名
count ‘member‘
删除整行
格式: deleteall 表名 row_key
deleteall ‘member‘,‘spring‘
将整张表清空
格式： truncate 表名
truncate ‘member‘ Truncating ‘member‘ table (it may take a while): - Disabling table... - Dropping table... - Creating table...
可以看出，hbase是先将掉disable掉，然后drop掉后重建表来实现truncate的功能的。
时间： 2024-10-03 22:40:31