1.进入hbase shell console
$HBASE_HOME/bin/hbase shell
如果有kerberos认证,需要事先使用相应的keytab进行一下认证(使用kinit命令),认证成功之后再使hbase shell进入可以使用whoami命令可查看当前用。
2.查看所有表
hbase(main):001:0> list TABLE OS_ORDER2 qqq scores t1 table2 5 row(s) in 0.2270 seconds => ["OS_ORDER2", "qqq", "scores", "t1", "table2"]
3.创建表
#表名为t1 ,family name为 f1和f2 版本为2 hbase(main):002:0> create 't1',{NAME => 'f1', VERSIONS => 2},{NAME => 'f2', VERSIONS => 2} 0 row(s) in 1.4210 seconds => Hbase::Table - t1
4.删除表
分为两部:1)先disable
2)然后drop
hbase(main):004:0> disable 't1'
hbase(main):005:0> drop 't1'
5.查看表结构
hbase(main):010:0> describe 't1' Table t1 is ENABLED t1 COLUMN FAMILIES DESCRIPTION {NAME => 'f1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '2', COMPRESSION => 'NONE', MIN_VERSIO NS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'} {NAME => 'f2', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '2', COMPRESSION => 'NONE', MIN_VERSIO NS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'} 2 row(s) in 0.0320 seconds
6.修改表结构
修改表结构需要先disable
hbase(main):002:0> disable 't1' 0 row(s) in 2.3620 seconds hbase(main):003:0> alter 't1',{NAME=>'body',TTL=>'15552000'},{NAME=>'meta', TTL=>'15552000'} Updating all regions with the new schema... 1/1 regions updated. Done. Updating all regions with the new schema... 1/1 regions updated. Done. 0 row(s) in 3.8080 seconds hbase(main):004:0> enable 't1' 0 row(s) in 1.2520 seconds
7.分配权限
# 语法 : grant <user> <permissions> <table> <column family> <column qualifier> 参数后面用逗号分隔 # 权限用五个字母表示: "RWXCA". # READ('R'), WRITE('W'), EXEC('X'), CREATE('C'), ADMIN('A') # 例如,给用户‘tr'分配对表t1有读写的权限, hbase(main)> grant 'trt','RW','t1'8.查看权限
# 语法:user_permission <table> # 例如,查看表t1的权限列表 hbase(main)> user_permission 't1'
9.去掉权限
# 与分配权限类似,语法:revoke <user> <table> <column family> <column qualifier> # 例如,收回tr用户在表t1上的权限 hbase(main)> revoke 'tr','t1'
10.添加数据
# 语法:put <table>,<rowkey>,<family:column>,<value>,<timestamp> # 例如:给表t1的添加一行记录:rowkey是rowkey001,family name:f1,column name:col1,value:value01,timestamp:系统默认 hbase(main)> put 't1','rowkey001','f1:col1','value01'
11.查询数据
1)查询一行数据
# 语法:get <table>,<rowkey>,[<family:column>,....] # 例如:查询表t1,rowkey001中的f1下的col1的值 hbase(main)> get 't1','rowkey001', 'f1:col1' # 或者: hbase(main)> get 't1','rowkey001', {COLUMN=>'f1:col1'} # 查询表t1,rowke002中的f1下的所有列值 hbase(main)> get 't1','rowkey001'2)扫描表
# 语法:scan <table>, {COLUMNS => [ <family:column>,.... ], LIMIT => num} # 另外,还可以添加STARTROW、TIMERANGE和FITLER等高级功能 # 例如:扫描表t1的前5条数据 hbase(main)> scan 't1',{LIMIT=>5}3)查询表中数据的行数
# 语法:count <table>, {INTERVAL => intervalNum, CACHE => cacheNum} # INTERVAL设置多少行显示一次及对应的rowkey,默认1000;CACHE每次去取的缓存区大小,默认是10,调整该参数可提高查询速度 # 例如,查询表t1中的行数,每100条显示一次,缓存区为500 hbase(main)> count 't1', {INTERVAL => 100, CACHE => 500}12.删除数据
1)删除一行中某个列的值
# 语法:delete <table>, <rowkey>, <family:column> , <timestamp>,必须指定列名 # 例如:删除表t1,rowkey001中的f1:col1的数据 hbase(main)> delete 't1','rowkey001','f1:col1'
2)删除一行数据
# 语法:deleteall <table>, <rowkey>, <family:column> , <timestamp>,可以不指定列名,删除整行数据 # 例如:删除表t1,rowk001的数据 hbase(main)> deleteall 't1','rowkey001'
3)删除表中所有的数据
# 语法: truncate <table> # 其具体过程是:disable table -> drop table -> create table # 例如:删除表t1的所有数据 hbase(main)> truncate 't1'