常用的HBase命令

进入HBase shell：hbase shell

退出HBase shell：exit

查看HBase中所有的表：list

查看某个表中的记录总数：count 'table name'

查看某个表中的全部信息：scan 'table name'

创建表，命令格式：create '表名称'，'列族名称1'，'列族名称2'，'列族名称N'，创建一个表名称为users，列族名称为id和sex的表：

hbase(main):004:0> create 'users','id','sex'
0 row(s) in 1.2820 seconds

=> Hbase::Table - users

查看表结构，命令格式：describe '表名称'，如下：

hbase(main):010:0> describe 'users'
Table users is ENABLED
users
COLUMN FAMILIES DESCRIPTION
{NAME => 'id', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'F
ALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0',
BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
{NAME => 'sex', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => '
FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0',
 BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
2 row(s) in 0.0190 seconds

向表中插入数据，命令格式：put '表名称','行名称','列族名称'（列族只有一列的情况）或  put '表名称','行名称','列族名称：列名称'（列族多列的情况），如下：

hbase(main):011:0> put 'users','001','sex:info','male'
0 row(s) in 0.0100 seconds

插入结果为：

hbase(main):012:0> scan 'users'
ROW                        COLUMN+CELL
 001                       column=sex:info, timestamp=1554882308361, value=male
1 row(s) in 0.0100 seconds

继续插入：

hbase(main):013:0> put 'users','001','id','001'
0 row(s) in 0.0050 seconds

查询结果为：

hbase(main):014:0> scan 'users'
ROW                        COLUMN+CELL
 001                       column=id:, timestamp=1554882816082, value=001
 001                       column=sex:info, timestamp=1554882308361, value=male
1 row(s) in 0.0050 seconds

继续插入：

hbase(main):016:0> put 'users','002','sex:num','1'
0 row(s) in 0.0050 seconds

hbase(main):017:0> put 'users','001','sex:num','0'
0 row(s) in 0.0040 seconds

hbase(main):018:0> put 'users','002','id','002'
0 row(s) in 0.0050 seconds

查询结果为：

hbase(main):019:0> scan 'users'
ROW                        COLUMN+CELL
 001                       column=id:, timestamp=1554882816082, value=001
 001                       column=sex:info, timestamp=1554882308361, value=male
 001                       column=sex:num, timestamp=1554883284741, value=0
 002                       column=id:, timestamp=1554883308366, value=002
 002                       column=sex:num, timestamp=1554883260287, value=1
2 row(s) in 0.0050 seconds