{"id":36155,"date":"2019-10-31T22:09:53","date_gmt":"2019-10-31T19:09:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/kachestvo-dannyh-v-hranilishhe\/"},"modified":"2019-10-31T22:09:53","modified_gmt":"2019-10-31T19:09:53","slug":"kachestvo-dannyh-v-hranilishhe","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/kachestvo-dannyh-v-hranilishhe","title":{"rendered":"Andmete kvaliteet salvestusruumis","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Andmete kvaliteet salves on v\u00e4\u00e4rtuslike teadmiste saamise oluline eeldus. Halva kvaliteedi t\u00f5ttu tekib pikaajaline negatiivne ahelreaktsioon.<br \/>\nEsialgu kaob usaldus pakutava teabe vastu. Inimesed hakkavad v\u00e4hem kasutama Business Intelligence rakendusi, rakenduste potentsiaal j\u00e4\u00e4b kasutamata.<br \/>\nTulemusena seatakse kahtluse alla edasised investeeringud anal\u00fc\u00fcsiprojekti.<\/p>\n<h4>Andmete kvaliteedi eest vastutamine<\/h4>\n<p>\nAndmete kvaliteedi parandamise aspekt on BI projektides erakordselt oluline. Kuid see pole ainult tehniliste spetsialistide privileeg.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nAndmete kvaliteedi kaudu m\u00f5jutavad ka sellised aspektid nagu<\/p>\n<p><b>Ettev\u00f5tte kultuur<\/b><\/p>\n<ul>\n<li>Kas t\u00f6\u00f6tajad on huvitatud kvaliteeti tootmisest?<\/li>\n<li>Kui ei, siis miks? V\u00f5ibolla on olemas huvide konflikt.<\/li>\n<li>V\u00f5ibolla on kehtivad ettev\u00f5tte reeglid, mis m\u00e4\u00e4ravad kvaliteedi eest vastutajad?<\/li>\n<\/ul>\n<p>\n<b>Protsessid<\/b><\/p>\n<ul>\n<li>Milliseid andmeid luuakse nende ahelate l\u00f5pus?<\/li>\n<li>V\u00f5ibolla on operatsioonis\u00fcsteemid seadistatud nii, et tuleb 'v\u00e4lja p\u00e4\u00e4seda', et kajastada teatud olukord reaalsuses.<\/li>\n<li>Kas operatsioonis\u00fcsteemid teevad andmete kontrollimist ja v\u00f5rreldes iseseisvalt?<\/li>\n<\/ul>\n<p>\nAndmete kvaliteedi eest aruandluss\u00fcsteemides vastutavad k\u00f5ik organisatsioonis.<\/p>\n<h4>M\u00e4\u00e4ratlus ja t\u00e4hendus<\/h4>\n<p>\nKvaliteet on kinnitatud klientide ootuste rahuldamine.<\/p>\n<p>Kuid andmete kvaliteet ei sisalda endas m\u00e4\u00e4ratlust. See peegeldab alati kasutamise konteksti. Andmehoidla ja BI-s\u00fcsteem t\u00e4idavad teistsuguseid eesm\u00e4rke kui operatsioonis\u00fcsteem, kust andmed on saadud.<\/p>\n<p>N\u00e4iteks v\u00f5ib operatsioonis\u00fcsteemis kliendi atribuut olla valikuline v\u00e4li. Andmehoidlas v\u00f5ib see atribuut olla m\u00f5\u00f5dik ja selle t\u00e4itmine v\u00f5ib olla kohustuslik. See omakorda toob kaasa vajaduse t\u00e4ita vaikev\u00e4\u00e4rtustega.<\/p>\n<p>Andmehoidla n\u00f5uded muutuvad pidevalt ning need on tavaliselt k\u00f5rgemad kui operatsioonis\u00fcsteemide omad. Kuid v\u00f5ib olla ka vastupidi, kui andmehoidlas ei n\u00f5uta \u00fcksikasjaliku teabe s\u00e4ilitamist operatsioonis\u00fcsteemist.<\/p>\n<p>Andmete kvaliteedi m\u00f5\u00f5tmise tagamiseks peavad olema m\u00e4\u00e4ratletud standardid. Inimesed, kes kasutavad teavet ja numbreid oma t\u00f6\u00f6s, peavad olema kaasatud kirjeldamisprotsessi. Selle kaasatuse tulemusena v\u00f5ib tekkida reegel, mille alusel on \u00fche pilguga tabelist n\u00e4ha, kas viga on olemas v\u00f5i mitte. Seda reeglit tuleb vormistada skripti \/ koodi kujul edasise kontrollimise jaoks.<\/p>\n<h4>Andmete kvaliteedi parandamine<\/h4>\n<p>\nAndmete salvestamise k\u00e4igus ei ole v\u00f5imalik puhastada ja parandada k\u00f5iki h\u00fcpoteetilisi vigu. Head andmekvaliteeti saab saavutada ainult k\u00f5igi osaliste tiheda koost\u00f6\u00f6 kaudu. Inimesed, kes sisestavad andmeid operatsioonis\u00fcsteemidesse, peavad \u00f5ppima, millised tegevused viivad vigadeni.<\/p>\n<p>Andmete kvaliteet on protsess. Kahjuks puudub paljusid organisatsioonides pideva parandamise strateegia. Paljud piiravad ennast vaid andmete s\u00e4ilitamisega ega kasuta anal\u00fc\u00fctiliste s\u00fcsteemide kogu potentsiaali. Andmehoidlate arendamise k\u00e4igus l\u00e4heb tavaliselt 70-80% eelarvest andmete integreerimise rakendamiseks. Kontrolli ja parandamise protsess j\u00e4\u00e4b sageli katki, kui see \u00fcldse olemas on.<\/p>\n<h4>T\u00f6\u00f6riistad<\/h4>\n<p>\nTarkvarat\u00f6\u00f6riistade kasutamine v\u00f5ib aidata andmekvaliteedi t\u00e4iustamise ja j\u00e4lgimise automatiseerimise protsessis. N\u00e4iteks saab t\u00e4iesti automatiseerida struktuuri tehnilise kontrollimise: v\u00e4ljade formaate, vaikev\u00e4\u00e4rtuste olemasolu ning tabeli v\u00e4ljade nimede vastavust standarditele.<\/p>\n<p>Sisuga kontrollimine v\u00f5ib olla keerulisem. Kuna andmestiku n\u00f5udmised muutuvad, v\u00f5ib ka andmete t\u00f5lgendus muutuda. T\u00f6\u00f6riist ise v\u00f5ib muutuda suureks projektiks, mis n\u00f5uab tuge.<\/p>\n<h4>N\u00f5uanne<\/h4>\n<p>\nRelatsioonilised andmebaasid, milles tavaliselt projekteeritakse ladustamisi, omavad suurep\u00e4rast v\u00f5imalust luua vaateid (views). Neid saab kasutada andmete kiireks kontrollimiseks, kui teada sisu erip\u00e4ra. Iga vea v\u00f5i probleemi tuvastamist andmetes saab fikseerida andmebaasi p\u00e4ringuna.<\/p>\n<p>Seega kujuneb teadmiste baas sisu kohta. Loomulikult peavad sellised p\u00e4ringud olema kiired. \u00dcldiselt v\u00f5tab vaate hooldus v\u00e4hem inimt\u00f6\u00f6d kui t\u00f6\u00f6riistade organiseerimine tabelites. Vaade on alati valmis kuvama kontrollimise tulemust.<br \/>\nOluliste raportite puhul v\u00f5ib vaade sisaldada veergu adressaadiga. On m\u00f5istlik kasutada samu BI t\u00f6\u00f6riistu, et luua aruandlust andmete kvaliteedi seisundi kohta andmeh\u00e4llis.<\/p>\n<h4>N\u00e4ide<\/h4>\n<p>\nP\u00e4ring on kirjutatud Oracle andmebaasi. Antud n\u00e4ites testid tagastavad arvulise v\u00e4\u00e4rtuse, mida saab soovitud viisil t\u00f5lgendada. V\u00e4\u00e4rtusi T_MIN ja T_MAX saab kasutada h\u00e4ire taseme reguleerimiseks. V\u00e4ljad REPORT on kunagi kasutatud teates kommertsettev\u00f5tte ETL tootes, mis ei osanud korralikult e-kirju saata, nii et rpad on \u201ek\u00f5rvallahendus\u201c.<\/p>\n<p>Suurte tabelite puhul v\u00f5ib lisada n\u00e4iteks AND ROWNUM &lt;= 10, st kui koguneb 10 viga, siis on see piisav h\u00e4ireks.<\/p>\n<pre><code class=\"sql\">Loo v\u00f5i asenda vaade V_QC_DIM_PRODUCT_01 AS\nSELECT\n  CASE WHEN OUTPUT &gt;= T_MIN AND OUTPUT &lt;= T_MAX\n  THEN &#039;OK&#039; ELSE &#039;ERROR&#039; END AS TULEMUS,\n  KIRTUS,\n  TABELI_NIMI,\n  OUTPUT,\n  T_MIN,\n  T_MAX,\n  rpad(KIRTUS,60,&#039; &#039;) || rpad(OUTPUT,8,&#039; &#039;) || rpad(T_MIN,8,&#039; &#039;) || rpad(T_MAX,8,&#039; &#039;) AS ARUANNE\nFROM (-- Test ise\n  SELECT\n    &#039;DIM_PRODUCT&#039; AS TABELI_NIMI,\n    &#039;T\u00fchi loendus&#039; AS KIRTUS,\n    COUNT(*) AS OUTPUT,\n    0 AS T_MIN,\n    10 AS T_MAX\n  FROM DIM_PRODUCT\n  WHERE DIM_PRODUCT_ID != -1 -- mitte vaikev\u00e4\u00e4rtus\n  AND ATTRIBUTE IS NULL ); -- loenda t\u00fchjad\n<\/code><\/pre>\n<p>\n<i>K\u00e4esolevas v\u00e4ljaandes on kasutatud materjale raamatust<br \/>\nRonald Bachmann, Dr. Guido Kemper<br \/>\nV\u00e4ljuda BI-l\u00f5ksust<br \/>\nKuidas \u00e4riintelligentsus saavutab edu<\/i><br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/459682\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u0430\u0436\u043d\u043e\u0439 \u043f\u0440\u0435\u0434\u043f\u043e\u0441\u044b\u043b\u043a\u043e\u0439 \u043a \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044e \u0446\u0435\u043d\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041f\u043b\u043e\u0445\u043e\u0435 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0432\u0435\u0434\u0451\u0442 \u043a \u043d\u0435\u0433\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u0446\u0435\u043f\u043d\u043e\u0439 \u0440\u0435\u0430\u043a\u0446\u0438\u0438 \u0432 \u0434\u043e\u043b\u0433\u043e\u0441\u0440\u043e\u0447\u043d\u043e\u0439 \u043f\u0435\u0440\u0441\u043f\u0435\u043a\u0442\u0438\u0432\u0435. \u0421\u043d\u0430\u0447\u0430\u043b\u0430 \u0442\u0435\u0440\u044f\u0435\u0442\u0441\u044f \u0434\u043e\u0432\u0435\u0440\u0438\u0435 \u043a \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041b\u044e\u0434\u0438 \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0442 \u043c\u0435\u043d\u044c\u0448\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c Business Intelligence \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043e\u0441\u0442\u0430\u0451\u0442\u0441\u044f \u043d\u0435 \u0432\u043e\u0441\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u043d\u044b\u043c. \u0412 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435, \u043f\u043e\u0434 \u0432\u043e\u043f\u0440\u043e\u0441 \u0441\u0442\u0430\u0432\u044f\u0442\u0441\u044f \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0438\u0435 \u0438\u043d\u0432\u0435\u0441\u0442\u0438\u0446\u0438\u0438 \u0432 \u0430\u043d\u0430\u043b\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043f\u0440\u043e\u0435\u043a\u0442. \u041e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u0437\u0430 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0434\u0430\u043d\u043d\u044b\u0445 \u0410\u0441\u043f\u0435\u043a\u0442, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-36155","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u0430\u0436\u043d\u043e\u0439 \u043f\u0440\u0435\u0434\u043f\u043e\u0441\u044b\u043b\u043a\u043e\u0439 \u043a \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044e \u0446\u0435\u043d\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. 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