Iimpawu zedatala yindlela elula yokudala idilesi yolwazi olufanelekileyo
Njengoko usenokuba uyayazi, iinkcukacha zolwazi zisebenzisa iitafile ukuhlela ulwazi. (Ukuba awunalo ulwazi oluqhelekileyo kunye neenkcukacha zeenkcukacha, funda ntoni iDatabase? ) Itheyibhile nganye inemiqolo emibini, nganye ehambelana nerekodi enye yedatha. Ngoko ke, iincwadi zolwazi zigcina njani ezi ngxelo ngqo? Kukusebenzisa ngokusebenzisa izitshixo.
Keys Primary
Uhlobo lokuqala loko siza kuxoxa ngalo luphambili . Yonke itafile yedata kufuneka ibe neyodwa okanye iikholomu ezikhethiweyo njengeyona nto ephambili . Ixabiso le nqoqo elibambayo kufuneka libe linye kwiirekhodi nganye kwisiseko sedatha.
Ngokomzekelo, cinga ukuba sinetafile ebizwa ngokuba ngabasebenzi abaqulethe ulwazi lomsebenzi ngamnye kumqeshwa kwi-firm firm yethu. Sifuna ukukhetha ikona ephambili efanelekileyo eyayiza kubonelela ngokucacileyo umsebenzi ngamnye. Ingcinga yakho yokuqala ingaba kukusebenzisa igama lomqeshwa. Oku akuyi kusebenza kakuhle kuba kucinga ukuba uya kuqesha abasebenzi ababini ngegama elifanayo. Ukhetho olungcono lunokuba lusebenzisa inombolo yesazisi yomqeshwa oyedwa owamisela ngamnye umsebenzi xa beqeshwe. Enye imibutho ikhetha ukusebenzisa iiNombolo zoKhuseleko loLuntu (okanye iinkcukacha zikarhulumente ezifanayo) kulo msebenzi ngenxa yokuba ngamnye umqeshwa sele ekhona kwaye baqinisekisiwe ukuba bahlukile. Nangona kunjalo, ukusetyenziswa kweenombolo zoKhuseleko loLuntu kule njongo kuxabana kakhulu ngenxa yokukhathazeka kwangasese. (Ukuba usebenza kwintlangano karhulumente, ukusetyenziswa kweNombolo yoKhuseleko loLuntu kungaze kubekho mthethweni phantsi koMthetho Wobumfihlo ka-1974.) Ngenxa yoko, ininzi imibutho ishintshele ekusebenziseni izihlomelo ezikhethekileyo (ID yomqeshwa, i-ID yomfundi, njl. .) ezingabelana ngezi ngxaki.
Emva kokuba ugqibe isigqibo esisisiseko kunye nokusekwa kwedata, inkqubo yolawulo lweenkcukacha izakugxininisa ukodwa okubalulekileyo.
Ukuba uzama ukufaka irekhodi kwitheyibhile eneenkcukacha eziphambili eziphindaphinda irekodi ekhoyo, ifayile iya kuphumelela.
Uninzi lweenkcukacha zikwazi ukuvelisa izitshixo eziphambili. Ukufikelela kweMicrosoft, umzekelo, unokuqwalaselwa ukuba isebenzise uhlobo lweData yeNombolo ukunika isazisi esikhethekileyo kwingxelo nganye etafileni. Ngelixa liphumelele, lo mkhwa wokuziphatha olungalungileyo kuba kukushiya ngexabiso elingenanjongo kwirekhodi nganye etafileni. Kutheni ungasebenzisi loo ndawo ukugcina into ebalulekileyo?
Iimpawu zangaphandle
Olunye uhlobo luyisihluthulelo sangaphandle , esetyenziselwa ukudala ubudlelwane phakathi kwetafile. Ubudlelwane bemvelo bukhoyo phakathi kweethala kwiinkalo ezininzi zeenkcukacha. Ukubuyela kwi-database yethu yabasebenzi, cinga ukuba sifuna ukufaka itafile equkethe ulwazi lweSebe kwiziko ledatha. Itheyibhile elitsha ingabizwa ngokuba yiMasebe kwaye iya kuba neenkcukacha ezininzi malunga neSebe lonke. Sifuna kwakhona ukubandakanya ulwazi malunga nabasebenzi kwisebe, kodwa kuya kuba nzima ukuba nolwazi olufanayo kwiibhulebhe ezimbini (abasebenzi kunye namasebe). Kunoko, sinokudala ubudlelwane phakathi kweetafile ezimbini.
Makhe sicinge ukuba iTheyibhuli yamasebe isebenzisa ikholam yegama leSebe njengeyona nto ephambili. Ukwakha ubudlelwane phakathi kweetafile ezimbini, songeza ikholamu entsha kwitafile zabasebenzi ezibizwa ngokuba yiSebe. Emva koko sizalise igama lesebe apho umqeshwa ngamnye engowakhe. Sikwazisa kwakhona inkqubo yolawulo lweenkcukacha ukuba ikhole yeSebe kwietafile zabasebenzi liyinkokeli yangaphandle esichaza itheyibhile yamasebe.
I-database iya kubeka ingqibelelo yokuthembeka ngokuqinisekisa ukuba zonke iimpawu kwiikholamu zamasebe eziSebenzi zineefom ehambelana netafile zamasebe.
Qaphela ukuba akukho mqobo oyingqayizivele yecandelo langaphandle. Singa (kwaye sinokuthi sinako) sinomsebenzi ongaphezu komnye omnye weli sebe elinye. Ngokufanayo, akukho mfuneko yokuba ukungena kwitafile yamasebe kunakho ukungena okuhambelana netafile zabasebenzi. Kungenzeka ukuba sibe neSebe ngaphandle kwabasebenzi.
Ukufumana okungakumbi kwesi sihloko, funda Ukudala iiKhenketho zangaphandle .