操作相關(guān)

//顯示版本 show version//新建存儲(chǔ)組 SET STORAGE GROUP TO root.test//顯示已經(jīng)創(chuàng)建的存儲(chǔ)組 SHOW STORAGE GROUP//刪除存儲(chǔ)組 delete storage group root.test//創(chuàng)建時(shí)間序列 create timeseries root.test.wf01.wt01.s0(elec_meter) with datatype=FLOAT, encoding=RLE, compression=SNAPPY,MAX_POINT_NUMBER=3 tags(tag1=t1, tag2=t2) attributes(attr1=a1, attr2=a2)//刪除時(shí)間序列 delete timeseries root.test.wf01.wt01.s0 delete timeseries root.test.wf01.wt01.*//更改時(shí)間序列 alter timeseries root.test.wf01.wt01.s0 DROP tag1, tag2 alter timeseries root.test.wf01.wt01.s0 SET tag1=t3, attr1=a3 alter timeseries root.test.wf01.wt01.s0 ADD TAGS tag3=t3, tag4=t4//顯示存儲(chǔ)組下時(shí)間序列 show timeseries root.test//模糊查詢(xún)?cè)O(shè)備下的序列 show timeseries root.test.*.wt01//加條件的查詢(xún)時(shí)間序列 show timeseries root.test where tag1=t1//統(tǒng)計(jì)時(shí)間序列 count timeseries root.test.*.wt01//根據(jù)層級(jí)分組，統(tǒng)計(jì)出每組下的時(shí)間序列個(gè)數(shù) count timeseries root.test group by level=3//統(tǒng)計(jì)存儲(chǔ)組對(duì)應(yīng)的層級(jí)下有幾個(gè)節(jié)點(diǎn) count nodes root.test level=3//統(tǒng)計(jì)存儲(chǔ)組下幾個(gè)設(shè)備 show devices root.test//顯示某一層下的子路徑 show child paths root.test.wf01

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CRUD

//插入記錄 insert into root.test.wf01.wt02(timestamp,elec_meter) values (1,23.896)//更新記錄 insert同時(shí)間戳覆蓋即可//刪除記錄 delete from root.test.wf01.wt02.s0,root.test.wf01.wt02.s1 where time < now()//查詢(xún)記錄 select temperature from root.test.wf01.wt01 where time >0 and time <5 select count(s0) from root.test.wf01.wt02 WHERE root.test.wf01.wt02.s0 < 25 select max_value(s0) from root.test.wf01.wt02 where time < now() - 5h select min_time(s0) from root.test.wf01.wt02//排序 0.11 select * from root.test.wf01.wt01 where time > 1 order by time desc limit 10;//分組應(yīng)用 //統(tǒng)計(jì)這段時(shí)間區(qū)間內(nèi)（前包，后不包）每隔5分鐘統(tǒng)計(jì)s0個(gè)數(shù) select count(s0) from root.test.wf01.wt02 group by ([1,259222222),5m) //統(tǒng)計(jì)這段時(shí)間內(nèi)每隔5小時(shí)，前2個(gè)小時(shí)有數(shù)據(jù)個(gè)數(shù) select count(s0) from root.test.wf01.wt02 group by ([86400000,259222222),2h,5h)//分頁(yè) //時(shí)間戳升序，首條下標(biāo)為0，取3條 select * from root.test.wf01.wt02 limit 3 offset 0//篩選最后一條記錄 select last temperature from root.test.wf01.wt02

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界面清潔神句 align by device

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聚合函數(shù)

COUNT函數(shù)返回由SELECT語(yǔ)句選擇的時(shí)間序列（一個(gè)或多個(gè)）非空值的值數(shù) FIRST_VALUE函數(shù)返回所選時(shí)間序列的第一個(gè)點(diǎn)值 LAST_VALUE函數(shù)返回所選時(shí)間序列的最后一個(gè)點(diǎn)值 MAX_TIME函數(shù)返回所選時(shí)間序列（一個(gè)或多個(gè)）的最大時(shí)間戳 MAX_VALUE函數(shù)返回所選時(shí)間序列（一個(gè)或多個(gè)）的最大值 AVG函數(shù)返回指定時(shí)間段內(nèi)所選時(shí)間序列的算術(shù)平均值 MIN_TIME函數(shù)返回所選時(shí)間序列的最小時(shí)間戳 MIN_VALUE函數(shù)返回所選時(shí)間序列（一個(gè)或多個(gè)）的最小值 NOW函數(shù)返回當(dāng)前時(shí)間戳 SUM函數(shù)返回指定時(shí)間段內(nèi)所選時(shí)間序列的總和

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總結(jié)

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