Uxhomekeko yokusetyenziswa zolwazi zonxulumelwano

Ulwazi bekusoloko kukho esinamandla eyaneleyo umdla. Development, edatha zonxulumelwano kunye nobuchwepheshe bolwazi iilwimi kweenkqubo kakhulu watshintsha umxholo kunye nolwakhiwo umdla. Kukho inkqubo ukumelwa ethile engqongqo. Semthethweni, izibalo ngqo kunye nobudlelwane yokubini ziye waba yimpumelelo yaye likhula ngokukhawuleza, indawo lobungcaphephe kunye namava.

Ihlabathi nendalo kolwazi ayitshintshanga zabafaki balo nokuphuhlisa nomxholo kunye nesakhiwo, akhwela indalo. It has a imilo ogudileyo, neyendalo akukho nto "uxande". Ulwazi, Kakade ke, ngokusemthethweni, kodwa onamandla, ukutshintsha kuphela data kanye ubuchule yokujongwa zabo, ukutshintsha imisebenzi ngokwabo kunye namasimi abo isicelo.

Information> kumhla data >>

Le nkcazelo iguqulelwa idatha (imodeli data, isakhiwo ulwazi, base data ...), njengoko ubona Ndingumqondisi. Akukho siqinisekiso sokuba lo mbono nto ilungile, kodwa xa inkqubo elisombulula ingxaki, i-data koko thaca indlela ngokwanelisayo kunokwenzeka.

Umbuzo ulwazi ngendlela efanelekileyo ngokusesikweni - ngumbandela kwexesha. Kude kube ngoku, isimaphambili se nemiba (self-lithathelwe ukutshintsha iimeko yokusetyenziswa) - liphupha nje iinkqubo.

sixhomekeke nabasebenzayo: "isigqibo esilungileyo = inkqubo (wenkqubo)" kunye nemeko 'ingxaki ukuthotyelwa oluqhubekayo "zisemthethweni kwiimeko ezininzi, kodwa kunye kuphela. Kodwa oku isiseko zezibalo, nto leyo esetyenziselwa ukudala oovimba.

mazwi ngqo: zabafaki zendalo kunye rhoqo kolwazi kanye ubuchule zokusombulula iingxaki ngokwenene ngamaxesha onke. A ledatha zonxulumelwano i ubuhlobo kabini + + imathematika engqongqo kuyilo oluchanileyo olusesikweni + ...

Idatha, iifayile kunye zolwazi

Indlela data zigcinwe ixesha elide Akukhathaliseki, nokuba imemori okanye isixhobo sangaphandle. Icandelo Hardware lifikelele kwisantya ngokuthe wophuhliso nokuqinisekisa umgangatho okulungileyo ininzi kakhulu.

ongakhetha yokugcina Main, embodiments ezahlukeneyo ekusebenziseni:

• iifayile;
• database.

Eyokuqala yanikwa kwi inceba uhlelo (loo ngxelo, yintoni format, indlela yokuyenza, ukufunda njani ...), owesibini nangoko kuzisa imfuno ulwazi izixhomekeki ezilula esebenza.

Izinga isampulu nokurekhodisha ulwazi iifayile (sobungakanani obububo kwaye ngeenkwenkwezi) ikhawuleza kakhulu, kwaye isantya imisebenzi sedata efana maxa wambi kakhulu kancinci.

amava Personal nobulumko nemibutho

Embalini kubekho iinzame ukuya ngaphaya Umda ngamnye ofikelelwayo, kodwa namhla zolwazi abuse zonxulumelwano. A ubutyebi enokuba ithiyori, isiko developers olunzulu kunye - abafanelekayo.

Ingqiqo ukuxhomekeka ezisebenzayo developers sedata inyanzelise wenkqubo, Nokuba akayi ngaba ufuna ukusebenzisa ubutyebi yamava lweMathematika-ubhalo yokwakha izakhiwo ukwaziswa, iinkqubo, umsebenzi kunye nabo, yeesampulu nokurekhodisha ulwazi.

Naxa kunjalo nje, eli wenkqubo ixhomekeke kwi-logic database, akunamsebenzi nokuba yintoni na afuna ukusebenza. Akukho umnqweno balandele izimiso, ungasebenzisa iifayile ukufumana ezininzi iifayile, kunye oluninzi kumava akhe. ixesha elininzi ixesha iza wachitha, yaye le ngxaki iya kusonjululwa ixesha elide.

Enoba kubonakale kunzima kangakanani imizekelo ukuxhomekeka esebenza, akuthethi watshona ezinzulwini intsingiselo nengqiqo. Amaxesha amaninzi, kufuneka kuqondwe ukuba ubukrelekrele nemibutho bakwazi ukuyila iinkcukacha ezahlukeneyo, ubungakanani ezahlukeneyo kunye nokusebenza:

• okuqinileyo Oracle;
• bafuna i-MS Kumncedisi we SQL le ;
• MySQL ethandwayo.

- zolwazi zonxulumelwano amahle kunye negama elihle, kulula ukuyisebenzisa, ukuzila ezandleni abanezakhono. ukusebenzisa kwabo konga ixesha kwaye akubikho mfuneko ukubhala le elandelayo sheet ikhowudi abangabancedani.

Features Programming and Data

Xa udweliso iye sisifo osoloko ngokutsha, phinda umsebenzi ngaphambili, ukuba ngandlel 'into ukuqhelana kukutshintsha ulwazi, umsebenzi, okanye imiqathango ukusetyenziswa kwayo ixesha elide.

Le peculiarity ye ukuxhomekeka ezisebenzayo kukuba, njengokuba kwi impazamo yomdwelisi wenkqubo enokubadla imali eninzi kakhulu. Lo msebenzi engelula. Ngokuqhelekileyo, ngexesha semthethweni iinkcukacha ezifunyenwe yi ukumelwa entsonkothileyo lwe data. izinto zabo akholisa ezichongiweyo, ngoko zihanjiswa kubudlelwane ezithile ezingundoqo, ngoko ukuba uhlobo algorithms emisiweyo iitafile, imibuzo, ubuchule nolwazi retrieval.

Amaxesha amaninzi ixabiso olukhulu ebotshelelwe encoding. Ayizizo zonke edatha zinika zingaqondwa ijongene izisombululo yeselula kakuhle kangakanani okuso I SQL yam, apho kukho iinkcukacha elinesibini, ukuba isebenza njani yaye uzinzile, nto enyanzela umphuhlisi ukwenza isiseko elinanye ezifanayo nezo sele apho.

Kukho amaxesha xa Ukubamba ekwabelwana ukulawula ukusebenza PHP kwaye kuchaphazela iinkqubo lokufikelela ledatha.

Umthwalo iinkqubo yanamhlanje ukuze algorithm inkqubo uxanduva elingana kulwenziwo kwemodeli data. Bonke kufuneka asebenze, kodwa kufuneka usoloko gxwa Kaka- le ngcamango.

DB: ubuhlobo elula i data

Okokuqala, isigama ledatha - eli database njenge inkqubo yolawulo iinkcukacha (umz, I SQL yam), yaye ezinye isakhiwo ulwazi ezibonisa izinto data kunye nobudlelwane phakathi kwabo. Enye MySQL «ubambe» phezu ngokwalo njengoko nezakhiwo iinkcukacha ezininzi kwizicelo ezahlukeneyo. Enye database Oracle angabonelela iinkqubo zolwazi kwinkampani enkulu okanye ibhanki ukulawula ukhuseleko data ingqibelelo kwelona nqanaba liphezulu, izithuthi kwiisethi iikhompyutha abazinzileyo imigama ezahlukeneyo kwiindawo ngesixhobo esahlukileyo.

EyamKelekileyo bacinga ukuba lo mlinganiselo imodeli esisiseko ezinobume. An ubuhlobo iyevakala - yiseti lwemihlathi kunye nezintlu kunye namagama amanani. "Ibhokisi" Classic (jonga itheyibhile) - inkqubela elula nesebenzayo. Yobumbaxa ukuxhomekeka yomsebenzi kuvimba iqala xa 'ibhokisi "baqalisa ukungena nolwalamano kunye nabanye.

Igama kwikholam nganye kwitheyibhile nganye kufuneka ibe ekhethekileyo ngokwemeko ngxaki. Kunjalo alikwazi anikwe iitafile ezimbini. Yazi intsingiselo yala magama:

• "Ukuchaza ubunjalo";
• "Ngaphandle komsebenzi";
• "Ubudlelwane Fixed";
• "Ukuze kuqinisekiswe ukuchaneka."

- sabaqalayo kufuneka usebenzise uvimba weenkcukacha kunye ukwakha imodeli data ukuba umsebenzi othile.

Ukophulwa nayiphi na la magama - ukusebenza phantsi kwe algorithm, isampuli data kade, yenza idata ezimiseleyo ilahleko kunye nezinye iingxaki.

ukuxhomekeka nabasebenzayo: ingqiqo nentsingiselo

Awukwazi ukufunda malunga tuples kobudlelwane, malunga yokuba umsebenzi - iseti lweempikiswano iseti lwamaxabiso kunye umsebenzi ezifana - ayikho nje ifomula okanye ishedyuli, kodwa unako kunikwa isethi imilinganiselo - itafile.

Akunjalo, kodwa ayikho buhlungu ukumela ubudlelwane siyasebenza njengeziko:

F (x1, x2, ..., xN) = (y1, y2, ..., yn).

Kodwa qiniseka ukuba baqonde ukuba emnyango - itafile, imveliso kwakhona itafile okanye isigqibo esithile. Ngokuqhelekileyo, ulwalamano esebenza icwangcisa logic ubudlelwane phakathi iitafile, imibuzo, amalungelo, ikhuthaza, iinkqubo egciniweyo kunye nezinye mathuba (components) database.

Ngokwesiqhelo, le theyibhile eziguqulelwe kwi omnye komnye, emva koko umphumo. Kodwa ke ukusetyenziswa ukuxhomekeka ezisebenzayo akuphelelanga le ngcamango. Uhlelo yakha ukumelwa kwedatha mfanekiso, domain imodeli, isakhiwo ulwazi ... enoba indlela ukubiza, kodwa ukuba usebenzela ledatha ethile, kufuneka zisekelwe ingqiqo yayo, ukuze bakuthathele ingqalelo intsingiselo yalo kunye nesi ulwimi, njengoko umthetho, SQL.

Kungaphikiswa ukuba iimpawu olusebenzayo izixhomekeki ledatha ziyafumaneka kwi iziyelelane esetyenziswa yi ulwimi SQL. Kodwa ke kubaluleke ngakumbi ukuba uqonde ukuba emva kokuba onke amahla ndinyuka uphuhliso, hayi iinkcukacha ezininzi wasinda, kodwa iintetho ezininzi ulwimi kunye ezichaphazela zezakhiwo yangaphakathi kwi iinkcukacha, kakhulu.

Owu Excel olungileyo endala

Xa computer lubonise ngokwayo phezu icala, ehlabathini kanye yahlulwe badwelisi benkqubo kunye nabasebenzisi. Njengoko umthetho, ukusetyenziswa lokuqala:

• PHP, Perl, JavaScript, C ++, Ugcino.
• I SQL yam, Oracle, MS SQL Server, Visual FoxPro.

yesibini:

• ILizwi.
• Excel.

Abanye abasebenzisi ukulawula ukwenza ezabo (ngaphandle koncedo badwelisi benkqubo) eLizwini Database - a ububhanxa ngokwenene.

Amava lwabasebenzisi ku Excel ukwakha uvimba - esebenzayo umdla. Eyona nto ibalulekileyo kukuba Excel, ngokwayo, lisebenza, inemibala kwaye aluncedo.

mbono Tabular licacise ingqikelelo ukuxhomekeka esebenzayo ukubonakala nokufikeleleka, kodwa bokuqonda ezihleli database nganye. Wonke umntu owakhe "ubuso" zabo, kodwa ukususela Excel Oracle ukulawula izikwere ezilula, okt iitafile.

Ukuba sicinga ukuba Excel - oku database, kodwa abaninzi, abasebenzisi (hayi ababhekisi) kunjalo kusetyenziswa, kwaye Oracle - untsokothile kwaye unamandla ukuphumeza iqela elikhulu developers na ebaleni iinkcukacha, kuba yendalo ukuvuma - database lumelo umdwelisi nkqubo ethile (team) ye ingxaki ezithile kunye isisombululo sayo.

Yintoni na ulwalamano esebenza, yintoni, phi, kutheni ... kuyabonakala kuphela umbhali okanye iqela yayo.

Malunga apho zengqondo zonxulumelwano na

inkqubela yenzululwazi kunye zeteknoloji - okuyinto ebuhlungu kakhulu, kwaye maxa wambi ukhohlakele. Ukuba uyakhumbula apho ledatha waqalisa, yintoni na .dbf *, zombini cybernetics ezinophawu, ngoko wamthanda nenzululwazi yekhompyutha waza amalungiselelo imiqobo ukuhamba abaxhakaxhaka kwinqanaba lizwe, kucacile ukuba kutheni zolwazi zonxulumelwano na enamandla yaye ulungile. Kutheni lohlobo olungagqibekangaName kule iinkqubo live namhla, kunye nokufakwa kweenkqubo into ebomini uxatyiswa nje, kodwa okwangoku asikabi.

Enoba intle ubudlelwane ezisebenzayo kwi imeko yemathematika:

Oku ubudlelwane yokubini, okanye kunoko, ithuba uhlaziye ingcamango yokuseka ubudlelwane phakathi ezininzi iimpawu, ukuba aphande i "one-to-ezininzi" unxibelelwano, "abaninzi ukuya kwenye", "abaninzi abaninzi" okanye "abaninzi ntoni, yaye elinye lazo."

ubudlelwane zeenketho ukuza kunye neentlobo ezininzi. Oku zemathematika logic, kwaye ngqongqo! Ulwazi - it imathematika yayo, ekhethekileyo. Kungaba kuphela nje usana ukuba athi kunye engxakini enkulu kunene.

Unga ngokusesikweni umsebenzi kwisebe yabasebenzi, bhala ACS ngenxa nezokukhupha oyile okanye ukuvelisa ubisi, isonka, ukwenza ukhetho kwi kwisiseko enkulu Google, Yandex kunye Rambler, kodwa umphumo uya kusoloko engatshintshiyo, yaye ingongoma nganye ngexesha iyafana!

Ukuba ubuhlobo esebenza = engqongqo logic zemathematika = isiseko solwazi, luhlobo olunjani nemiba singakwazi ukuthetha. Nasiphi na isigqibo uya kuba esesikweni, naluphi na uhlobo data ngokusesikweni + = algorithm olungqongqo isigqibo ngqo kwaye acacile. Ulwazi kunye nesiqulatho nayiphi na inkqubo utshintsha ngawo onke amaxesha.

Sample enjini yokukhangela kwi ibinzana elifanayo ukufuna akunakuba njalo emva kweyure okanye ezimbini, yaye, ngokucacileyo, ngemini - ukuba kumba wophendlo libhekisela kummandla ulwazi apho inani leziza, izibonelelo, ulwazi, kunye nezinye izinto rhoqo ukutshintsha .

Malunga kwimigca izinto

Nokuba inkqubo sicacisa zemathematika, yaye ledatha yayo ayenziwanga kwanokucinga malunga nemiba zonke kusoloko kukho umgca. Kwaye kukho umgca elide. Kwaye akupheli ayikwazi ukuba. Kusenokuba nokuba ibe variable, variable phantsi kwemiqathango ethile kuphela. Ukongeza, naliphi na iziko ledatha yabo zemathematika lokubini-mthetho sama sibonakala oluninzi nemimiselo, yaye le isantya + umgangatho isampulu kunye ingcaciso.

строки условно-переменной длины с массой бинарных формальностей и строгих математических ограничений. Ukuba aba okanye ezinye iinkalo kwiziko ledatha i data, ingakumbi yokwenene kwi nciphiso ziza kongezwa: inombolo bit, ubukho ngoonobumba 'e', format ntetho - ngokufutshane yonke kwaye nisoloko iimpawu ezibalulekileyo izixhomekeki sedata nabasebenzayo: umtya enemiqathango ubude eziguquguqukayo esinobunzima of okubini okusemthethweni kunye nezithintelo engqongqo zezibalo.

Ukuba utshintsha ithoni umamele ubume malunga nemiba, zonke izinto zingenziwa zipeyintwe. Kulo kelelo yokuqala, igama umqolo kwindlela yemigca - yinto into, uluhlu lwamagama - into efanayo, xa itheyibhile elifutshane - i header into kwaye amagama ntsika kwi header. Neminqwazi azikwazanga ...

Noko ke, strings inokuba itafile. Nasengcamangweni kungazisa ixabiso. Kwaye isizathu sokuba kusoloko kufuneka inani elifanayo. itheyibhile Full square - oku ethile, yaye kwiimeko ezininzi, abucala.

Ukuba Ngaba unokuyithelekelela zonke yoyilo kwicandelo izinto database, ngoko, mhlawumbi, musa ukuba kwakhiwe ubudlelwane engqongqo yokubini. Le yendalo kwaye ngokwenene, ukuba nje kuba yinto njongo (ngokuqinisekileyo hayi zemathematika) logic ibonakalisa Dynamics ulwazi kunye nokusingqongileyo apho kukho imisebenzi.