Data Warehouse & Data Mining e
Iqukethe izikhangiso
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Okudawunilodiwe
Wonke umuntu
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Mayelana nalolu hlelo lokusebenza
Kulolu hlelo lokusebenza uthola izifundo + zokuzivocavoca + nokulungiswa kwemininingwane ku-Data Waherouse ne-Dining Mining
Kuyini "Idatha Warehouse" kuqala? :
Kuluhlobo lwedatha equkethe inani elikhulu ledatha ukusiza ukwenza izinqumo ngaphakathi kwenhlangano. Lolu hlobo lwedatha lubonakala ngokuhambisana kwesakhiwo sayo sangaphakathi nalokho okudingwa ngumsebenzisi kusukela kuzinkomba nama-axes wokuhlaziya kulokho okubizwa ngokuthi yimodeli yenkanyezi, kanye nokusebenza kwayo: izinhlelo ukusekelwa kwezinqumo kanye nokuvukuzwa kwedatha.
Izindawo zokugcina idatha ziqukethe idatha yomlando ethathiwe futhi ikhishwe kwidatha kwimininingwane ejwayelekile esetshenziswe kuzicelo lapho imisebenzi eminingi yokufaka nokuvuselela yenzeka khona, futhi izindawo zokugcina imininingwane nazo zingaba nakho idatha evela kweminye imithombo efana namafayela wombhalo kanye neminye imibhalo.
Kuyini i- "Data Mining"? :
Kucwaninga ngekhompiyutha nangencwadi yolwazi lwedatha ngaphandle kwemidwebo eyandulelayo yokuthi lolu lwazi lungaba yini. Ukumbiwa kwemininingwane kuchazwa njengenqubo yokuhlaziya inani ledatha (imvamisa isamba esikhulu), ukuthola ubudlelwane obunengqondo obufingqa idatha ngendlela entsha eqondakalayo futhi ewusizo kumnikazi wedatha . "Amamodeli" abizwa ngokuthi ubudlelwano nedatha efingqiwe etholakala kwimayini yedatha. Izimayini zedatha ngokuvamile ziphathelene nedatha etholakele ngenhloso engeyona eyemayini yedatha (ngokwesibonelo, i-database yezentengiselwano ebhange), okusho ukuthi indlela yezimayini ye idatha ayithinti indlela imininingwane uqobo eqoqwa ngayo. Lokhu kungenye yezindawo lapho izimayini zedatha zihluke kakhulu kwizibalo, futhi ngenxa yalesi sizathu inqubo yokumbiwa kwemininingwane ibizwa ngokuthi inqubo esezingeni lesibili. Le ncazelo ibuye ikhombise ukuthi inani ledatha ngokuvamile likhulu, kepha uma inani ledatha lilincane, kungcono ukusebenzisa izindlela ezijwayelekile zezibalo ukulihlaziya.
Lapho ubhekene nenombolo enkulu yemininingwane, kuqhamuka izinkinga ezintsha njengokuthi ungawathola kanjani amaphuzu ahlukile emininingwane, ukuthi ungayihlaziya kanjani imininingwane ngesikhathi esifanele nokuthi unganquma kanjani uma ubuhlobo obonakalayo bubonisa iqiniso ngokohlobo lwedatha. . Imvamisa, kukhishwa imininingwane eyingxenye yemininingwane esethiwe, lapho inhloso kuvame ukwenza imiphumela ibe yonkana kuyo yonke imininingwane (ngokwesibonelo, ukuhlaziya idatha yamanje yabathengi bomkhiqizo ukuze balindele izimfuno zesikhathi esizayo abathengi). Enye yezinhloso zemayini yedatha futhi ukunciphisa noma ukucindezela inani elikhulu ledatha ukuveza idatha elula ngaphandle kokwenza jikelele.
Kuyini "Idatha Warehouse" kuqala? :
Kuluhlobo lwedatha equkethe inani elikhulu ledatha ukusiza ukwenza izinqumo ngaphakathi kwenhlangano. Lolu hlobo lwedatha lubonakala ngokuhambisana kwesakhiwo sayo sangaphakathi nalokho okudingwa ngumsebenzisi kusukela kuzinkomba nama-axes wokuhlaziya kulokho okubizwa ngokuthi yimodeli yenkanyezi, kanye nokusebenza kwayo: izinhlelo ukusekelwa kwezinqumo kanye nokuvukuzwa kwedatha.
Izindawo zokugcina idatha ziqukethe idatha yomlando ethathiwe futhi ikhishwe kwidatha kwimininingwane ejwayelekile esetshenziswe kuzicelo lapho imisebenzi eminingi yokufaka nokuvuselela yenzeka khona, futhi izindawo zokugcina imininingwane nazo zingaba nakho idatha evela kweminye imithombo efana namafayela wombhalo kanye neminye imibhalo.
Kuyini i- "Data Mining"? :
Kucwaninga ngekhompiyutha nangencwadi yolwazi lwedatha ngaphandle kwemidwebo eyandulelayo yokuthi lolu lwazi lungaba yini. Ukumbiwa kwemininingwane kuchazwa njengenqubo yokuhlaziya inani ledatha (imvamisa isamba esikhulu), ukuthola ubudlelwane obunengqondo obufingqa idatha ngendlela entsha eqondakalayo futhi ewusizo kumnikazi wedatha . "Amamodeli" abizwa ngokuthi ubudlelwano nedatha efingqiwe etholakala kwimayini yedatha. Izimayini zedatha ngokuvamile ziphathelene nedatha etholakele ngenhloso engeyona eyemayini yedatha (ngokwesibonelo, i-database yezentengiselwano ebhange), okusho ukuthi indlela yezimayini ye idatha ayithinti indlela imininingwane uqobo eqoqwa ngayo. Lokhu kungenye yezindawo lapho izimayini zedatha zihluke kakhulu kwizibalo, futhi ngenxa yalesi sizathu inqubo yokumbiwa kwemininingwane ibizwa ngokuthi inqubo esezingeni lesibili. Le ncazelo ibuye ikhombise ukuthi inani ledatha ngokuvamile likhulu, kepha uma inani ledatha lilincane, kungcono ukusebenzisa izindlela ezijwayelekile zezibalo ukulihlaziya.
Lapho ubhekene nenombolo enkulu yemininingwane, kuqhamuka izinkinga ezintsha njengokuthi ungawathola kanjani amaphuzu ahlukile emininingwane, ukuthi ungayihlaziya kanjani imininingwane ngesikhathi esifanele nokuthi unganquma kanjani uma ubuhlobo obonakalayo bubonisa iqiniso ngokohlobo lwedatha. . Imvamisa, kukhishwa imininingwane eyingxenye yemininingwane esethiwe, lapho inhloso kuvame ukwenza imiphumela ibe yonkana kuyo yonke imininingwane (ngokwesibonelo, ukuhlaziya idatha yamanje yabathengi bomkhiqizo ukuze balindele izimfuno zesikhathi esizayo abathengi). Enye yezinhloso zemayini yedatha futhi ukunciphisa noma ukucindezela inani elikhulu ledatha ukuveza idatha elula ngaphandle kokwenza jikelele.
Kubuyekezwe ngo-
Ukuphepha kuqala ngokuqonda ukuthi onjiniyela baqoqa futhi babelane kanjani ngedatha yakho. Ubumfihlo bedatha nezinqubo zokuphepha zingahluka kuye ngokusebenzisa kwakho, isifunda, nobudala. Unjiniyela unikeze lolu lwazi futhi angalubuyekeza ngokuhamba kwesikhathi.
