Samar da database: hanyoyin da data kasance mafita

Wannan labarin ya bayyana tsari da cewa shirye-shirye da aka kira a matsayin "halittar database." Mun bayyana cewa shi ne quite tedious. Better, ba shakka, mutanen da ba su da free lokaci a cikin wadannan "Jungle" ba za. Yana da sauƙin to amince da wannan aiki kwararru. To, a yau da internet ne cike da irin talla. Alal misali, akwai wani cibiyar sadarwa na aikin kai mu'amala ko kama sana'a, zaka iya samun articles a kan wani canji. Don haka kana bukatar ka nema domin kafa irin wannan shirin a matsayin al'ada labarin, ta kwatanta zama dole aiki.

Mene ne halittar wani database? Akwai biyu daban na database: tebur da kuma abokin ciniki-uwar garke. Don ƙirƙirar tebur databases kana bukatar wani shirin kamar Access. Za ka iya samun shi a wani ofishin suite sauƙi. Samun yanzu samar da m Infra-Office, Microsoft da kuma wasu masu halittawa daga ofishin babban dakuna. Kamar yadda na abokin ciniki-uwar garke model, wani sauki model za a iya aiwatar da dakarun 'horo »Delphi shirin. Tsanani database yau an rubuta su a Oracle da kuma Kayayyakin Fox Pro. Wadannan software dandamali suna sanye take da wani zana kayan aiki domin samar da sarrafa buƙatun da database a cikin 500 000 da kuma miliyan 1 ko da miliyoyin layuka.

Ka yi la'akari da mafi m dandamali ga shirye-shirye na yesteryear Delphi 6.0. Mun ce a lokaci daya da cewa halittar wani database a Delphi - shi ne ba kawai samun fayiloli * .db ko * bdb, da kuma installing shi a kan PC, kunna da kuma aiki da kai. Saboda haka, a Delphi 6.0 Halicci database fayil a wani subroutine dake a cikin babban menu na IDE, Kwanan Base Desktop 6.0.

A nan za ka sami duk kayan aikin da za ka bukatar ka ƙirƙiri wani database fayil, da manufar da irin pre-cika. Ka lura da cewa za ku zama samuwa da halittar kuma da aiki na kawai ne ga waɗanda fayiloli ga wanda direba aka sanya a kan dandamali. Alal misali, yin aiki tare da irin Kayayyakin Fox Pro 9.0 wajibi ne don shigar da ƙarin a waje tsarin aiki direba.

Game da aikin shirin database, halitta a Delphi 6.0, ba tare da ta Gwamuwar da dandamali, wannan matsalar da aka warware ta installing da kuma harhadawa software Data Base Engine 6.0 kunshin (BDE).

Saboda haka, idan kana niyya ga aikin da Paradox fayil type, sa'an nan rubuce-rubuce a shirin a cikin wani musamman fayil a kan rumbun kwamfutarka, sa'an nan ka bukatar Register da saituna a cikin kunshin Data Base Engine 6.0, wanda sun hada da fayil hanyõyi, dũkiyõyinsu, da kuma database sunan. Wannan makirci aiki a lokacin da ka motsa ka ka ƙirƙiri shirye-shirye zuwa wani kwamfuta.

Kunshin da Data Base Engine 6.0 dole ne a shigar a kan kwamfuta inda ka shigar Delphi 6.0 tsara don inji code.

Samar da wani database a kan Delphi 6.0 isasshe sarrafa kansa. A na farko shirin for adanar bayanai da database fayil an samu ta 'yan keystrokes. A nan, da babban wahala qarya a cikin aiwatar da zumunci database siffofin. Kamar wancan PDNF 3 za a iya gane ta kafa biyu DBGRID Tables. Kuma da shiri na daban-daban iri rahotanni a QReport - wannan shi ne labarin cewa ba ya ko son taba. Isar da shi a ce, shi ne mafi alhẽri kafa wani shirin code ba jefa a cikin kwandon a matsayin kowane mai amfani da asusun ga mutãne waɗanda suke sani ba da SQL, za a kaddara sake ...

Access don ƙirƙirar wani database a cikin ofishin suite ba wuya. Faruwa a cikin shirin, za ka samu damar zuwa da zama dole kayayyakin aiki, don ƙirƙirar ko gyara wani data kasance database. Ga ba ka da zuwa exert yawa kokarin haifar da wani rahoto, ko da wani sabon tsari na aikin. Duk abin da aka yanke shawarar kusan lamirinsu. Saboda haka, na haxi tsakanin allunan yin amfani da wani kayan aiki zana cewa kusan daya touch Can mahada to your ake so key biyu da ake buƙata Tables.

Wannan labarin ya tattauna kawai halittar wani database a kan horo da kuma tebur kunshe-kunshe. Game da tsanani shirye-shirye, ba tare da sanin wanzuwar wadannan dandamali ba za ka taba magance matsalar ta hanyar sabawa manyan databases.