Indlela Yokuvula, Hlela, & Ukuguqula Amafayela DDL
Ifayela elinesandiso sefayela le-DDL yifayela le-SQL Data Definition Language. Lawa amafayili wombhalo ocacile aqukethe imiyalo esetshenziselwa ukuchaza isakhiwo sedatha, njengamatafula ayo, amarekhodi, amakholomu kanye nezinye izinkambu.
Isibonelo, enikeziwe ukuthi imithetho ethile ye- syntax ilandelwa, ifayela leDDL lingasebenzisa umyalo wokudala ukwakha izizinda, isethi yomlingisi, namatafula. Ezinye izibonelo zomyalo zifaka i- DROP, i-RENAME , ne- ALTER .
Qaphela: Igama elithi DDL lisetshenziselwa umqondo jikelele ukuchaza noma yiluphi ulimi olubhekisela kumininingwane noma izakhi zedatha, ngakho-ke zonke ifayela lezincazelo zolimi lweDatha lisebenzisa isandiso sefayela leDDL. Eqinisweni, amafayela amaningi olimi lwe-SQL Definition Language aphela ku-SQL.
Indlela Yokuvula Ifayela LeDDL
Amafayela e-DDL angavulwa nge-EclipseLink noma i-IntelliJ IDEA. Enye indlela yokuvula ifayela le-DDL inesicelo esisekela ukufunda amafayela wombhalo, njengalabo esikukhethile ngesandla kulolu hlu oluhleliwe lwabalungisi be-Free Free .
Qaphela: Kukhasi lokulanda le-IntelliJ IDEA yizixhumanisi ezimbili ze-Windows, MacOS, ne-Linux. Ukulanda okulodwa kuzokunika i- Ultimate edition kanti enye ingomagazini woMphakathi . Bobabili bangavula futhi bahlele amafayela e-DDL kodwa kuphela ukhetho lomphakathi luvulekile-umthombo futhi lukhululekile; enye ikhululekile kuphela ngesikhathi sokuvivinywa.
Ithiphu: Uma uthola ukuthi uhlelo lokusebenza ku-PC yakho lizama ukuvula ifayela leDDL kodwa uhlelo olungalungile noma uma ngabe unomunye uhlelo olufakiwe oluvuliwe amafayela e-DDL, bheka indlela yethu yokushintsha uhlelo oluzenzakalelayo lomhlahlandlela wokukhulisa ifayela eliqondile ngokwenza lolo shintsho ku-Windows.
Indlela yokuguqula ifayela leDDL
Izinhlobo eziningi zefayili zingaguqulwa ngokusebenzisa i- converter yefayela yamahhala , kodwa angazi noma yiziphi eziqondile ezingaguqula amafayela aqeda ngeDDL. Ngenxa yokuthi lesi sandiso sefayela sibonakala singavamile, akunakwenzeka ukuthi kunezinketho eziningi zokuguqula amafayela e-DDL kumafomethi ahlukene.
Kodwa-ke, into eyodwa ongayenza ivula ifayela leDDL ngolunye lwabavuli befayili ngenhla, bese usebenzisa ifayela le- Fomu noma I- Export menu ukuze ulondoloze ifayela kufomethi ehlukile. Izinhlelo eziningi zisekela lolu hlobo lokuguqulwa, ngakho-ke kunethuba elihle lokuthi labo abaxhunywe ngenhla nabo, nabo.
Enye indlela ukusebenzisa i-Inthanethi ye-Inthanethi mahhala. Ingashintsha amafomethi amaningi asekelwe ematheksthini kwezinye amafomethi efayela afanayo, ngakho-ke kungase kube usizo ekuguquleni umbhalo ngaphakathi kwefayela leDDL kwenye enye ifomethi. Uma kusebenza, mane nje ukopishe umbhalo ophumayo kusukela ekuguqulweni futhi unamathisele kumhleli wombhalo ukuze uyisindise ngesandiso sefayela esifanele.
Nakuba angingaqiniseki ngokuphelele ukuthi lolu hlobo lokuguqulwa lusebenza kanjani, i-IBM ine-tutorial ye-Splitting DDL engase ibe usizo uma usebenzisa ifayela le-DDL ne-IBM Redbooks.
Ingabe Ifayela Lakho Alikavuli?
Isizathu esizwakalayo sokuthi kungani ungakwazi ukuvula ifayela lakho ngisho nangemva kokuzama abavuli be-DDL ngenhla, kungenxa yokuthi udideka ifayela elihlukile kulowo osebenzisa i-.DDL ye-extension yefayela. Ezinye izandiso zefayela zibukeka ngendlela efanayo, kodwa lokho akusho ukuthi amafomethi wefayela lawo ahlobene.
Isibonelo, ungabona ukuthi kungaba lula kanjani ukudidisa ifayela leDLL ngefayela leDDL yize kungavulwa izinhlelo ezifanayo noma ukusebenzisa ifomethi efanayo. Uma usebenza ngempela nefayela le-DLL, uzothola impela amaphutha noma imiphumela engalindelekile uma uzama ukuvula eyodwa nge-DDL ifayela lokuvula, futhi ngokuphambene nalokho.
Kuyafana namafayela e-DDD. Lawa angamafayili e-Alpha Five Data Dictionary noma amafayela we-GLBasic 3D Data, kodwa nanoma yimuphi walawo mafomethi ahlangene namafayela e-SQL Data Definition Language. Njengamanye amafayela we-DLL, udinga uhlelo oluhlukile ukuwavula.
Uma ungenayo ifayela leDDL ngempela, cwaninga isandiso sefayela esihlanganisiwe ekupheleni kwefayela lakho. Ngaleyo ndlela, ungathola ukuthi iyiphi ifomethi futhi yiziphi izinhlelo zesofthiwe ezihambisana nefayela elithile.
Usizo Oluthe xaxa Ngezingcingo zeDDL
Uma unayo ifayela le-DDL kodwa lingavulwa noma lisebenza kahle, bheka Uthola Usizo Olwengeziwe ngolwazi mayelana nokuxhumana nami kumanethiwekhi omphakathi noma nge-imeyili, ukuthumela kumaforamu wokusekela we-tech, nokuningi. Ngitshele ukuthi yiziphi izinkinga ohlangabezana nazo ngokuvula noma usebenzisa ifayela leDDL futhi ngizobona ukuthi ngingenzani ukusiza.