列出所有 table¶
hbase(main):> list
新增 table¶
A . 直接增加一個表 t2
hbase(main):> create 't2'
B . 增加一個擁有 'f1','f2','fn' 為 column family 的表: t1
hbase(main):> create 't1','f1','f2','fn'
查詢 Table 欄位¶
hbase(main):> describe 't1'
執行結果參考
hbase(main):> describe 't1'
DESCRIPTION ENABLED
{NAME => 't1', FAMILIES => [{NAME => 'f1', COMPRESSION => 'NONE', VERS true
IONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => '
false', BLOCKCACHE => 'true'}, {NAME => 'f2', COMPRESSION => 'NONE', V
ERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =
> 'false', BLOCKCACHE => 'true'}, {NAME => 'fn', COMPRESSION => 'NONE'
, VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMOR
Y => 'false', BLOCKCACHE => 'true'}]}
加入cell-value¶
需先擁有表 t1 與column-family : f1 並且加入一個 column-quantifier c1
hbase(main):> put 't1', 'r1', 'f1', 'v1' hbase(main):> put 't1', 'r1', 'f1:c1', 'v2' hbase(main):> put 't1', 'r2', 'f2', 'v3' hbase(main):> put 't1', 'r2', 'f2:c2', 'v4'
| Table: 't1' | ||||||
| row-key | 'f1' | 'f2' | 'fn' | column-family | ||
| * | 'c1' | * | 'c2' | * | column-quantifier | |
| r1 | v1 | |||||
| v2 | ||||||
| r2 | v3 | |||||
| v4 | ||||||
列出cell-value¶
A . 列出一列(row)
hbase(main):> get 't1', 'r1'
執行結果參考
COLUMN CELL f1: timestamp=1285737082689, value=v1 f1:c1 timestamp=1285737085874, value=v2
| Table: 't1' | ||||||
| row-key | 'f1' | 'f2' | 'fn' | column-family | ||
| * | 'c1' | * | 'c2' | * | column-quantifier | |
| r1 | v1 | |||||
| v2 | ||||||
| r2 | v3 | |||||
| v4 | ||||||
B . 列出一個 cell 的值
hbase(main):> get 't1', 'r1', {COLUMN => 'f1:c1'}
執行結果參考
COLUMN CELL f1:c1 timestamp=1285737085874, value=v2
| Table: 't1' | ||||||
| row-key | 'f1' | 'f2' | 'fn' | column-family | ||
| * | 'c1' | * | 'c2' | * | column-quantifier | |
| r1 | v1 | |||||
| v2 | ||||||
| r2 | v3 | |||||
| v4 | ||||||
刪除 cell-value¶
hbase(main):> deleteall 't1','r1'
執行結果：會把 row-key 是 'r1' 的所有紀錄。此時資料表 't1' 會變成如下表所示。
hbase(main):> scan 't1' ROW COLUMN+CELL r2 column=f2:, timestamp=1285737091644, value=v3 r2 column=f2:c2, timestamp=1285737094157, value=v4
| Table: 't1' | ||||||
| row-key | 'f1' | 'f2' | 'fn' | column-family | ||
| * | 'c1' | * | 'c2' | * | column-quantifier | |
| r2 | v3 | |||||
| v4 | ||||||
加入column family¶
hbase(main):> disable 't1'
hbase(main):> alter 't1', {NAME => 'f3'}
hbase(main):> enable 't1'
執行結果：多了一個 column-family 'f3' 可以用 describe 指令查詢，結果示意如下表：
hbase(main):021:0> describe 't1'
DESCRIPTION ENABLED
{NAME => 't1', FAMILIES => [{NAME => 'f1', COMPRESSION => 'NONE', VERS true
IONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => '
false', BLOCKCACHE => 'true'}, {NAME => 'f2', COMPRESSION => 'NONE', V
ERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =
> 'false', BLOCKCACHE => 'true'}, {NAME => 'f3', VERSIONS => '3', COMP
RESSION => 'NONE', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMOR
Y => 'false', BLOCKCACHE => 'true'}, {NAME => 'fn', COMPRESSION => 'NO
NE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_ME
MORY => 'false', BLOCKCACHE => 'true'}]}
| Table: 't1' | |||||||
| row-key | 'f1' | 'f2' | 'f3' | 'fn' | column-family | ||
| * | 'c1' | * | 'c2' | * | * | column-quantifier | |
| r2 | v3 | ||||||
| v4 | |||||||
刪除column family¶
hbase(main):> disable 't1'
hbase(main):> alter 't1', {NAME => 'f1', METHOD => 'delete'}
hbase(main):> enable 't1'
執行結果：會移除 column family 為 'f1' 的所有欄位，可用 describe 指令確認，結果如下表所示。
hbase(main):053:0> describe 't1'
DESCRIPTION ENABLED
{NAME => 't1', FAMILIES => [{NAME => 'f2', COMPRESSION => 'NONE', VERS true
IONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => '
false', BLOCKCACHE => 'true'}, {NAME => 'f3', COMPRESSION => 'NONE', V
ERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =
> 'false', BLOCKCACHE => 'true'}, {NAME => 'fn', COMPRESSION => 'NONE'
, VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMOR
Y => 'false', BLOCKCACHE => 'true'}]}
1 row(s) in 0.0200 seconds
| Table: 't1' | |||||||
| row-key | 'f2' | 'f3' | 'fn' | column-family | |||
| * | 'c2' | * | * | column-quantifier | |||
| r2 | v3 | ||||||
| v4 | |||||||
節點狀態¶
hbase(main):> status
刪除整張table¶
hbase(main):> truncate 't1'
- 執行完 truncate 後，所有 't1' 的內容都會被移除。但此時，下 list 還會有 't1' 這個表格存在。
hbase(main):> disable 't1' hbase(main):> drop 't1'
- 要完整移除 't1' 資料表，必須使用 disable 先將 't1' 停用，再用 drop 指令把 't1' 完全刪除。
转自：http://trac.nchc.org.tw/cloud/wiki/NCHCCloudCourse100929_2_USE
本文转自茄子_2008博客园博客，原文链接：http://www.cnblogs.com/xd502djj/p/3401078.html，如需转载请自行联系原作者。
