Hbase 查詢命令 條件篩選

方便測試

建一下表

hbase(main):001:0> create 'student','c1'

不寫namespace的話就是默認在default里

查詢有哪些namespace

hbase(main):001:0> list_namespace

查看表的全量數據

hbase(main):002:0> scan 'default:student'

放入一些測試數據

put 'student','1001','c1:id','1001' put 'student','1002','c1:id','1002' put 'student','1003','c1:id','1003' put 'student','1004','c1:id','1004' put 'student','1005','c1:id','1005'

只查詢一行

hbase(main):025:0> scan 'student',LIMIT=>1 ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=1001

查詢表的總記錄數

count 'student'

按寫入的時間戳查詢數據

scan 'student', {COLUMN => 'c1', TIMERANGE => [1658827317000,1658913717000]}

查詢值為1002的記錄

hbase(main):004:0> scan 'student',FILTER=>"ValueFilter(=,'binary:1002')" ROW COLUMN+CELL1002 column=c1:id, timestamp=1658911989184, value=1002 1 row(s) in 0.1060 seconds

查詢c1:id列的值為1002的

hbase(main):006:0> scan 'student',COLUMNS => 'c1:id',FILTER=>"ValueFilter(=,'binary:1002')" ROW COLUMN+CELL1002 column=c1:id, timestamp=1658911989184, value=1002 1 row(s) in 0.0340 seconds

查詢值包含100的記錄,就跟sql的模糊匹配一樣

hbase(main):007:0> scan 'student',FILTER=>"ValueFilter(=,'substring:100')" ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=10011002 column=c1:id, timestamp=1658911989184, value=10021003 column=c1:id, timestamp=1658911989217, value=10031004 column=c1:id, timestamp=1658911989243, value=10041005 column=c1:id, timestamp=1658911989788, value=1005 5 row(s) in 0.0470 seconds

為了方便列的其他查詢，多放入一個列

put 'student','1001','c1:sex','1' put 'student','1002','c1:sex','2' put 'student','1003','c1:sex','1' put 'student','1004','c1:sex','2' put 'student','1005','c1:sex','1'hbase(main):015:0* scan 'student' ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=10011001 column=c1:sex, timestamp=1658914149713, value=11002 column=c1:id, timestamp=1658911989184, value=10021002 column=c1:sex, timestamp=1658914152500, value=21003 column=c1:id, timestamp=1658911989217, value=10031003 column=c1:sex, timestamp=1658914152535, value=11004 column=c1:id, timestamp=1658911989243, value=10041004 column=c1:sex, timestamp=1658914152563, value=21005 column=c1:id, timestamp=1658911989788, value=10051005 column=c1:sex, timestamp=1658914153242, value=1 5 row(s) in 0.0390 seconds

查詢列為id打頭的值

hbase(main):019:0> scan 'student',FILTER=>"ColumnPrefixFilter('id')" ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=10011002 column=c1:id, timestamp=1658911989184, value=10021003 column=c1:id, timestamp=1658911989217, value=10031004 column=c1:id, timestamp=1658911989243, value=10041005 column=c1:id, timestamp=1658911989788, value=1005 5 row(s) in 0.0270 seconds

各項查詢的條件是可以疊加的，比如下面這個

查詢列為id打頭且值為1003的

hbase(main):020:0> scan 'student',FILTER=>"ColumnPrefixFilter('id') AND ValueFilter(=,'binary:1003')" ROW COLUMN+CELL1003 column=c1:id, timestamp=1658911989217, value=1003 1 row(s) in 0.0550 seconds

查詢rowkey為100打頭的

hbase(main):021:0> scan 'student',FILTER=>"PrefixFilter('100')" ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=10011001 column=c1:sex, timestamp=1658914149713, value=11002 column=c1:id, timestamp=1658911989184, value=10021002 column=c1:sex, timestamp=1658914152500, value=21003 column=c1:id, timestamp=1658911989217, value=10031003 column=c1:sex, timestamp=1658914152535, value=11004 column=c1:id, timestamp=1658911989243, value=10041004 column=c1:sex, timestamp=1658914152563, value=21005 column=c1:id, timestamp=1658911989788, value=10051005 column=c1:sex, timestamp=1658914153242, value=1

查詢rowkey為100打頭的且不同返回列信息

hbase(main):022:0> scan 'student',FILTER=>"PrefixFilter('100') AND KeyOnlyFilter()" ROW COLUMN+CELL1001 column=c1:id, timestamp=1658911986336, value=1001 column=c1:sex, timestamp=1658914149713, value=1002 column=c1:id, timestamp=1658911989184, value=1002 column=c1:sex, timestamp=1658914152500, value=1003 column=c1:id, timestamp=1658911989217, value=1003 column=c1:sex, timestamp=1658914152535, value=1004 column=c1:id, timestamp=1658911989243, value=1004 column=c1:sex, timestamp=1658914152563, value=1005 column=c1:id, timestamp=1658911989788, value=1005 column=c1:sex, timestamp=1658914153242, value= 5 row(s) in 0.0670 seconds

從特定行開始查三行

hbase(main):006:0> scan 'student',{STARTROW=>'1002',LIMIT=>3} ROW COLUMN+CELL1002 column=c1:id, timestamp=1658911989184, value=10021002 column=c1:sex, timestamp=1658914152500, value=21003 column=c1:id, timestamp=1658911989217, value=10031003 column=c1:sex, timestamp=1658914152535, value=11004 column=c1:id, timestamp=1658911989243, value=10041004 column=c1:sex, timestamp=1658914152563, value=2 3 row(s) in 0.0300 seconds

獲取特定的行

hbase(main):007:0> get 'student','1001' COLUMN CELLc1:id timestamp=1658911986336, value=1001c1:sex timestamp=1658914149713, value=1 2 row(s) in 0.0170 seconds

默認的查詢是正序，倒敘使用REVERSED => TRUE

scan 'student',{REVERSED => TRUE,LIMIT=>1}

以上這些命令基本滿足大部分的查詢需求了

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