Fakafalala Taumahi me pātengi tūhonohono

Kuo hoko ma'u pē Information te hihiri tika o te moni. Development, pātengi tūhonohono me reo hōtaka hangarau mōhiohio tino ke te ihirangi me te hanganga o te moni. He he he tetahi pūnaha kanohi tino. Whakaōkawa, kua riro te pāngarau tangohia me whanaunga ā-he angitu, me te tere tipu, rohe o te tohungatanga me te wheako.

E kore kua te ao tūturu o te mōhiohio ke ona akiakinga me te whakawhanake i te ihirangi me te hanganga, piki ki tiketike hou. He he āhua maeneene, a i roto i te āhua ki reira he mea "tapawhā". Information, o te akoranga, kia whakamanatia, engari te mea he hihiri, te huri i te raraunga, me hātepe o ratou tukatuka kore anake, te huri i te mahi ratou me o ratou mara o tono.

Information> whakaōkawa o raraunga >>

Kei te tahuri te mōhiohio ki te raraunga (tauira raraunga, hanganga mōhiohio, turanga raraunga ...) rite kite reira kaihātepe. Kahore he taurangi e he tika tenei kite, engari ki te solves te hōtaka te raruraru, i reira te aroaro te raraunga ara āta taea.

Ko te pātai o te mōhiohio pehea tika whakamanatia - he mea o te wā. Mohoa noa nei, te ariā o akiaki (whaiaro urutaunga-ki te huri tikanga o te whakamahi) - anake moemoea o hōtaka.

fakafalala Taumahi: "te whakatau tika = hōtaka (kaihātepe)" me te huru o "hanganga ture tonu raruraru" He tika i roto i te nuinga o te wā, engari tahi anake. Otiia e kore e te mea he pūtake pāngarau, whakamahia nei te ki te waihanga pātengi raraunga tenei.

tauākī Direct: dynamics tūturu me tonu o te mōhiohio me te hātepe raruraru-rapanga tino tonu. He pātengi raraunga tūhonohono ko te pā ana ā-rua + + pāngarau tino hoahoa ōkawa tika + ...

Raraunga, ngā kōnae me ngā pātengi raraunga

Kia pehea te te rongoa raraunga mō te wa roa e kore e mea faufaa, e te reira mahara he pūrere waho ranei. Kua tae wähanga Hardware he tere tonu o te whanaketanga me te whakarite te kounga pai i roto i ngā pukapuka nui.

kōwhiringa rokiroki Main, rerekē taatou i whakamahi:

• kōnae;
• pātengi raraunga.

homai ana te tuatahi kei te i te aroha o te kaihātepe (e lekooti, i aha hōputu, me pehea ki te mahi i te reira, me pehea ki te pānui i ...), e hopoi mai tonu te tuarua o nga hiahia mo te matauranga o ririki mahi ohie.

Te auau tīpako me te tuhi kōrero i runga i ngā kōnae (rahi whaitake, me te kore arorangi o) Ko te tino nohopuku, me te tere o ngā mahi pātengi raraunga rite taea ētahi wā kia tino pōturi.

wheako whaiaro me te whakaaro nui ngā

I roto i te aamu i reira kua whakamātau ki te haere ki tua atu tae te rohe kei te, engari ki tenei ra pātengi raraunga tūhonohono pule. He taonga o pūmanawa ariā, te mahi o whānui me ngā - tohu.

Ko te ariā o te ti'aturiraa mahi o ngā pātengi raraunga tangohia te kaihātepe, ara, ki te kore ia e hiahia ki te whakamahi i te taonga o te wheako pāngarau-arorau o hanga hanganga mōhiohio matatini, ngā tukanga, te mahi ki a ratou, te kohi, me te tuhi kōrero.

Ahakoa i roto i te take māmā, tei te kaihātepe i runga i te arorau pātengi raraunga, pe ko e hā ia whiriwhiri ki te mahi. Kahore he hiahia ki te whai i nga kēnana, ka taea e koe te whakamahi i te kōnae e whiwhi i te rota o ngā kōnae, me te rota o te wheako whaiaro. ka pau te rota o te wā whaiaro, a ka te raruraru e faatiti'aifarohia mo te wa roa.

No mea pehea uaua kia puta tauira o fakafalala mahi, e kore e tika totohu ki te rire o te tikanga me te arorau. Pinepine, kia mohio ai e ki te maramarama ngā taea te hanga pātengi raraunga rerekē, te rahi rerekē me te taumahinga:

• mārō Oracle;
• tono i te MS te Tūmau SQL ;
• MySQL rongonui.

- ki te pai pātengi tūhonohono ki te ingoa pai, ngāwari te whakamahi, nohopuku i roto i te ringa mohio. Ratou whakamahi whakaora wa, me te faaore i te hiahia ki te tuhituhi i te waehere pŭpŭ tauturu pepa muri.

Āhuatanga Papatonotanga me Raraunga

I roto i te hōtaka kua roa kua he mate e te tonu tuhia anōtia, faahiti i te mahi o mua, e ki te hopoia te tahi mea urutau ki te mōhiohio ke, mahi, ranei nga tikanga o tona whakamahi.

Ko te taa o te fakafalala mahi ko e, rite i roto i te hapa hōtaka e taea e tino utu. Ko uaua ohie te mahi. Ko te tikanga, i roto i te whakaōkawa o te mōhiohio whiwhi e te māngai matatini o te raraunga. Kei te nuinga o tāutuhia, ka e hono ana ratou ratou huānga ki etahi hononga matua, ka te whakapumautia hātepe ahua o papa, uiui, hātepe mōhiohio tiki.

E mea pinepine e here ana uara nui te ki te waehere. Ehara i whakahere pātengi raraunga katoa maha taea te fehangahangai rongoā pūkoro ki MySQL pehea pai faata'i, i runga i nei takoto i te pātengi raraunga tatini, mahi pai, me te pūmau, akina te kaiwhakawhanake ki te hanga tekau ma tahi o te turanga rite ki te hunga kua i reira.

He wā ka tauwhāiti he whakahaere ngā te taumahinga o PHP me pānga ki te hōtaka o te whai wāhi pātengi raraunga.

I roto i te kawenga hōtaka o tenei ra mo te hātepe hōtaka kawenga ōrite mo te hanganga o te tauira raraunga. kia mahi katoa, engari me rumakina e nga wa katoa koutou ki te rīrapa o te ariā.

DB: whanaungatanga ohie i roto i te raraunga

Tuatahi o te katoa, te ariā o te pātengi raraunga - tenei pātengi raraunga rite te pūnaha whakahaere pātengi raraunga (hei tauira, MySQL), me etahi hanganga mōhiohio e whakaata ana i te taonga raraunga me te whanaungatanga i waenganui i a ratou. Kotahi pātengi raraunga MySQL «mau» i runga ake rite maha hanganga mōhiohio mō ngā tono. Ka taea e tetahi Oracle pātengi raraunga whakarato tukanga mōhiohio o te kamupene nui pēke ranei ki te whakahaere i te haumarutanga me te raraunga tapatahi i te taumata teitei, i kei i runga i te huinga o ngā rorohiko e te hunga i tawhiti rerekē i roto i ngā taiao taputapu rerekē.

Kua Whakaaetia amo e te ōwehenga ko te tauira tūhonohono taketake. He pā ana māmā - ko te huinga o tīwae me nga rarangi ki nga ingoa o uara. Classic "pouaka" (kite tepu) - he ahunga whakamua ohie, me te whai hua. Ko te matatini me te fakafalala mahi o te pātengi raraunga haamata ina e timata i te "pouaka" ki te tomo ki te hononga ki ia atu.

Me te ingoa o ia tīwae i roto i ia tepu ahurei i roto i te horopaki o te raruraru. Ko te taua e kore e taea te hoatu i roto i te rua nga tepu. Mohio te tikanga o te ariā:

• "Te tautuhi i te faufaa";
• "Waiho hapanga";
• "Hononga pūmau";
• "Ki te whakarite i te tika."

- Me he māmā ki te whakamahi i te pātengi raraunga, me te hanga i te tauira raraunga mo te mahi motuhake.

Tūkinotanga o tetahi o enei ariā - te tōtika iti o te hātepe, tīpako raraunga puhoi, ngaronga raraunga me ētahi atu raru.

fakafalala Taumahi: te arorau me te tikanga

E kore e taea e koe te pānui i pā ana ki te tuples o whanaunga, e pā ana ki te meka i te mahi - he huinga o ngā tohenga ōrite huinga o ngā uara, me te mahi - e kore te mea tika te tātai hōtaka ranei, engari e taea te hoatu he huinga o ngā uara - tepu.

Ehara i tika, engari e kore e whara ki tohu te whanaungatanga mahi rite:

F (x1, x2, ..., xn) = (te Y1, y2, ..., yn).

Engari kia mohio ki te mahino e i te tomokanga - te tepu, ko ano hoki te putanga he tepu, he whakatau motuhake ranei. Tikanga, E whakatakotoria ana e te hononga mahi te arorau o te hononga i waenganui i te tepu, uiui, haamaitairaa, pāngia e, ngā tukanga rongoa me ētahi atu taime (wāhanga) pātengi raraunga.

Tikanga, kua tahuri nga tepu ki ia atu, ka ki te hua. Otiia e kore e te te whakamahi o te ti'aturiraa mahi iti ki te whakaaro taua. Ko te rorohiko hanga te kanohi o te raraunga pikitia, te tauira rohe, hanganga mōhiohio ... noa'tu te huru ki te karanga i reira, engari ki te mahi i te reira mo te pātengi raraunga motuhake, me te hāngai ki runga ki tona arorau, ki te tango ki te pūkete tona tikanga me te mita o te reo e whakamahia ana, rite ki te tikanga, SQL.

Ka taea te tohe te reira e e wātea ana nga āhuatanga mahi o te ririki pātengi raraunga i roto i te reo e whakamahia ana e te reo SQL. Otiia nui atu mahu'inga ki te matau e muri i nga piki katoa me ngā heke o te whanaketanga, e kore e pera maha pātengi ora, engari he maha reo o te reo me te pau o ngā hanganga ā-i roto i te pātengi raraunga, rawa.

Aue te Excel tawhito pai

A, no te whakaaturia te rorohiko i ano i te taha ki pai, kei te kotahi wehea te ao ki hötaka me ngā kaiwhakamahi. Ka rite ki te tikanga, te whakamahi tuatahi:

• PHP, Perl, JavaScript, C ++, Delphi.
• MySQL, Oracle, MS SQL Tūmau, Visual FoxPro.

tuarua:

• Kupu.
• Excel.

Ētahi kaiwhakamahi te whakahaere ki te hanga i to ratou ake (i waho te awhina o hötaka) i roto i te Kupu Database - he tino tito noa.

Ko te wheako o ngā kaiwhakamahi i roto i te Excel ki te waihanga i tētahi pātengi raraunga - mahi, me te ngā. Ko te mea nui, ko te e Excel, i tahaki, he mahi, karakara, me te mahi.

Kua tautuhia whakaaro ripa te ariā o te ti'aturiraa mahi o te aritanga me urutanga, engari ko nga mita i ia pātengi raraunga. Ko ia tangata e to ratou ake "mata", engari i te Excel ki Oracle rāwekeweke tapawhā ohie, tepu arā.

Ki te whakaaro tatou e Excel - e kore ko tenei te pātengi raraunga, engari tokomaha, ngā kaiwhakamahi (kore ngā) te na whakamahia ai, me te Oracle - he matatini, me te kaha ki te whakatutuki i te rōpū nui o ngā kei roto i te parae o pātengi raraunga, riro te reira maori ki te whakaae - te pātengi raraunga ko te kanohi kaihātepe ngā (kapa) o te raruraru motuhake, me tona otinga.

He aha te mea te hononga mahi, ki te mea, i reira, he aha ... ki te kaituhi ranei ona rōpū āhua anake.

Mō te wahi waiaro tūhonohono e

te ahunga whakamua Scientific me hangarau - te tukanga tino mamae, me ētahi wā kino. Ki te haamana'o koe te wahi i tīmata te pātengi raraunga, he aha te .dbf *, e rua cybernetics parani, ka hinga i roto i te aroha ki te pūtaiao rorohiko, ka anga ki te whakarite ngaahi fakafaingata'a'ia'anga ki te kaupapa o tiketike-tech i te taumata whenua, riro te reira mārama he aha e pera tenacious me pai pātengi tūhonohono. He aha ko te kāhua matarohia ki tenei ra hötaka ora, me hōtaka ahanoa-hāngai te wāriutia noa, engari kua kore e ano kingi.

No mea pehea ataahua te hononga mahi i roto i te horopaki o pāngarau:

E kore te mea tenei te hononga ā-rua, ranei kaua, he reira he take ki te rethink te whakaaro o te haamauraa i te whanaungatanga i waenganui i te plurality o ngā huanga, ki te tirotiro i te "kotahi-ki-maha" kōrero, "he tokomaha ki tetahi", "he tokomaha ki tokomaha" ranei "tokomaha mahi, a kotahi i roto i ngā."

Ka taea e Kōwhiringa whanaunga haere ake ki te momo nui. te pāngarau tenei ki arorau, a ko reira tino! Information - te mea ona ake pāngarau, motuhake. Ka taea e anake e te reira i he ōkawa ki te mea ki te ngoikoretanga nui rawa.

Ka taea e koe te whakaōkawa i te mahi o te tari kaimahi, tuhituhi ACS mo te tangohanga o te hinu te hanga o te waiu ranei, taro, kia he kōwhiringa i roto i te turanga nui o Google, Yandex ko Rambler, engari i nga wa katoa ka te hua e pateko, me ia wāhi i roto i te wa ko te taua!

Ki te te hononga mahi = arorau tino me pāngarau = pūtake mo te pātengi raraunga, he aha te ahua o akiakinga e taea tatou te kōrero. ka kia ōkawa tetahi whakatau, i tetahi tauira raraunga ōkawa + = hātepe pakari whakatau pū, me te unambiguous. Mōhiohio me te whānuitanga o tetahi hōtaka taui i nga wa katoa.

search engine Tauira i runga i te parau rapu taua e kore e taea e te taua i muri i te haora e rua ranei, a, mārama, i roto i te ra - ki te pā te parau rapu ki te wāhi ngā mōhiohio i roto i nei i te maha o ngā pae, ngā rauemi, te matauranga, me ētahi atu āhuatanga e tonu te huri .

Mō raina me ngā

Ahakoa, ki te he pono pāngarau te hōtaka, me kore te ara whakaaro i tona pātengi raraunga e pā ana ki nga akiaki o katoa i reira he tonu he aho. Na reira ko te raina roa. A ko reira mure kore e taea e. kia kore noa e te reira i te tāupe, te tāupe herenga anake. I tua atu, i tetahi pātengi raraunga o ratou pāngarau, me te rua-taero haamau te rota o ōkawa, me tenei tere + te kounga tīpako me te mōhiohio tukatuka.

строки условно-переменной длины с массой бинарных формальностей и строгих математических ограничений. Ki te ka enei atu ranei mara i roto i te pātengi raraunga o te raraunga, rawa tūturu i roto i te fakangatangata te tāpiri: te tokomaha moka, te aroaro o te pukapuka 'e', hōputu whakaaturanga - i roto i nga wahi katoa poto, me te whai tonu nga āhuatanga nui o ririki pātengi raraunga mahi: string here roa tāupe ki te papatipu o-rua ōkawa me te tino herenga pāngarau.

Ki te huri koe i te oro, me te whakarongo ki te pini o te akiakinga, e taea te peitatia ahanoa katoa i runga i. I roto i te āwhiwhitanga tuatahi, te ingoa tīwae i roto i te tepu - ko te ahanoa, he rārangi o ngā ingoa - te ahanoa taua, i roto i te tepu poto - he pane ahanoa me reira ingoa o te pou i roto i te pane. A kihai i taea e potae e ...

Heoi, kia waiho aho he tepu. A i roto i te aho e taea kia o uara. A he aha nga wa katoa kia ratou hei te tau kotahi. Full tepu tapawha - tenei ngā, me i nuinga o te wā, tūmataiti.

Ki te whakaaro koe whakaaro katoa i roto i nga taonga pātengi raraunga, ka, pea, e kore e whai ki te hanga i te whanaunga-rua tino. Ko te taiao tenei me te tikanga tūturu, ki te anake te mea te mea he whāinga o whakaata (tino kore pāngarau) arorau nga akiaki o te mōhiohio me te taiao i roto i nei i reira he mahi.