Kusintha
Chepetsani marekodi kuti mupange kagawo kakang'ono, koyimilira kankhokwe kogwirizana ndikusunga kukhulupirika
Chiyambi cha Subsetting
subsetting ndi chiyani?
Chepetsani chiwerengero cha marekodi kuti mupange kagulu kakang'ono koyimilira kankhokwe kogwirizana ndi umphumphu wosungidwa
Chifukwa chiyani mabungwe amagwiritsa ntchito subsetting?
Mabungwe ambiri ali ndi malo opanga omwe ali ndi data yochulukirapo ndipo safuna kuchuluka kwa data m'malo oyesera osapanga. Chifukwa chake, kuyika kwa database kumagwiritsidwa ntchito popanga kagawo kakang'ono, koyimilira kagawo kakang'ono kaubale komwe kamakhala kotetezedwa. Mabungwe amagwiritsa ntchito masinthidwe ang'onoang'ono pa data yoyeserera kuti achepetse ndalama, kuti azitha kuwongolera komanso kukhazikitsa ndi kukonza mwachangu.
Chepetsani ndalama zoyendetsera ntchito komanso ndalama zowerengera
Kuchulukitsitsa kwa data kumatha kupangitsa kuti pakhale ndalama zambiri zopangira zomangamanga komanso kuwerengera ndalama, zomwe sizofunikira pazoyeserera m'malo osapanga. Ndi kuthekera kosinthira, mutha kupanga mosavuta magawo ang'onoang'ono a data yanu kuti muchepetse ndalama zanu.
Data yoyeserera yokhoza kuyendetsedwa ndi oyesa ndi opanga
Kuwongolera kuchuluka kwa data m'malo osapanga kumabweretsa zovuta kwa oyesa ndi opanga. Zing'onozing'ono komanso zokhoza kuyendetsa bwino deta yoyesa, kuwongolera kwambiri njira zoyesera ndi chitukuko, potsirizira pake kukhathamiritsa kuzungulira konseko malinga ndi nthawi ndi zothandizira.
Kukhazikitsa ndi kukonza deta mwachangu
Ma data ang'onoang'ono amathandizira kukhazikitsa mwachangu komanso molunjika komanso kukonza malo osapanga mayeso. Izi ndizofunikira makamaka m'mawonekedwe ovuta a IT ndipo pamene kusintha kwafupipafupi m'mapangidwe a deta kumafuna kusinthidwa pafupipafupi ndi kutsitsimula kuti zitsimikizire kuyimira kwa deta.
Kodi kukhulupirika kwachikhulupiriro ndi chiyani ndipo n’chifukwa chiyani kuli kofunika?
Referential integrity ndi lingaliro mu kasamalidwe ka database lomwe limatsimikizira kusasinthika ndi kulondola pakati pa matebulo mu database yaubale. Kukhulupirika kwapagulu kungawonetsetse kuti mtengo uliwonse womwe umagwirizana ndi "Munthu 1" wa "Table 1" ukugwirizana ndi mtengo wolondola wa "munthu 1" mu "Table 2" ndi tebulo lina lililonse lolumikizidwa.
Kulimbikitsa kukhulupirika ndikofunikira pakusunga kudalirika kwa data yoyeserera mu nkhokwe yaubale monga gawo la malo osapanga. Zimalepheretsa kusagwirizana kwa deta ndikuwonetsetsa kuti maubwenzi pakati pa matebulo ndi othandiza komanso odalirika kuti ayesedwe moyenera ndi kupanga mapulogalamu.
Deta yoyesera mumalo osungiramo ogwirizana iyenera kusunga kukhulupirika kuti zigwiritsidwe ntchito. Kusunga umphumphu m'malo osapanga, monga omwe amagwiritsidwa ntchito poyesa ndi kupanga mapulogalamu, ndikofunikira pazifukwa zingapo:
Kukhazikitsa, osati kosavuta monga "kungochotsa deta"
Kuyika pang'onopang'ono sikophweka monga kungochotsa deta, chifukwa matebulo onse okhudzana ndi mtsinje ndi mtunda ayenera kusinthidwa molingana kuti asunge kukhulupirika kwawo. Subsetting imawonetsetsa kuti si data yokhayo yomwe ili patebulo yomwe mukufuna imachotsedwa, komanso kuti data iliyonse patebulo ina iliyonse yolumikizidwa yokhudzana ndi zomwe zachotsedwa patebulo lomwe mukufuna zimachotsedwa. Izi zimatsimikizira kuti kukhulupirika kwachidziwitso pamatebulo, nkhokwe ndi machitidwe amasungidwa ngati gawo lochotsa deta.
Kuchepetsa kuchuluka kwa data pochotsa "Munthu X" pa "Table Y", zolemba zonse zokhudzana ndi "Munthu X" mu "Table Y" ziyenera kuchotsedwa, komanso zolemba zonse zokhudzana ndi "Munthu X" patebulo lina lililonse lakumtunda kapena lapansi (tebulo A, B, C etc.) ziyenera kuchotsedwa.
Kuchepetsa kuchuluka kwa data pochotsa "Richard" patebulo la "Makasitomala"., zolemba zonse zokhudzana ndi "Richard" patebulo la "Kasitomala" ziyenera kuchotsedwa, komanso zolemba zonse zokhudzana ndi "Richard" patebulo lina lililonse lokhudzana ndi mtsinje kapena kutsika kwa mtsinje (Tebulo la Malipiro, tebulo la zochitika, Table Coverage Table etc.) ayeneranso kukhala zachotsedwa.
Acros tables
Subsetting imagwira ntchito pa matebulo
Acros database
Subsetting imagwira ntchito pa database
Acros Systems
Subsetting imagwira ntchito pamakina onse
Kodi muli ndi mafunso alionse?
Lankhulani ndi mmodzi wa akatswiri athu
Kodi ndingagwiritse ntchito bwanji subsetting?
Proportional subsetting
Mutha kusintha Syntho Engine kuti mukhazikitse nkhokwe yaubale ndikuwonetsetsa kuti "matebulo olumikizidwa" asinthidwa kutengera "Target Table".
- Gome lomwe mukufuna: Ogwiritsa ntchito amatha kutanthauzira tebulo lomwe mukufuna kuti likhale poyambira poyambira.
- Ogwiritsa ntchito amatha mwachitsanzo kutanthauzira kuyika "Patient Table" ku 5% kapena ku 500k zolemba m'malo mwa 10.000k zolemba.
- Matebulo olumikizidwa: Onsewa ndi matebulo olumikizidwa mwachindunji kapena mwanjira ina ku "Target Table". Ulalo pakati pa matebulo utha kukhala wachindunji, monga tebulo lomwe latsata lomwe limatchula zowawa zomwe zimawonetsa tebulo la odwala kudzera muubwenzi wakunja, kapena mosalunjika, monga tebulo lomwe likuwonetsa tebulo la odwala, lomwe limatchulanso tebulo lachipatala.
- Subsetting imatsimikizira kuti zolemba zonse zokhudzana ndi zomwe zachotsedwa mu "Patient Table" idzachotsedwanso. Mu chitsanzo, subsetting imatsimikizira kuti mu "Linked Table" pali deta yokha yomwe ikugwirizana ndi 5% (500k recors) ndi kuti deta ina yonse yokhudzana ndi 95% (10.000k - 500k = 9.500k zolemba) imachotsedwa. kuti apange kagawo kakang'ono koyimilira kankhokwe kogwirizana komwe kamakhala kotetezedwa
Kukhazikitsa kutengera malamulo abizinesi
Kuphatikiza pa ma proportional subsetting, pomwe mumatchula kuchuluka kwa deta, luso lathu lapamwamba limakupatsani mwayi wofotokozera bwino gulu lomwe mukufuna kusintha. Mwachitsanzo, mutha kutchula zofunikira kuti muphatikizepo kapena kusapatula magawo ena ang'onoang'ono, zomwe zimakupatsani kusinthasintha kwakukulu ndikuwongolera njira yochotsa deta.
- Makasitomala ochepera zaka 60 ndi wamkulu kuposa zaka 30 ndi
- Als Male makasitomala
Sungani kalozera wanu wazinthu zopangira tsopano!
- Kodi data yopanga ndi chiyani?
- Chifukwa chiyani mabungwe amachigwiritsa ntchito?
- Mtengo wowonjezera wamakasitomala opangira data
- Momwe mungayambire
