I-database ye-Oracle iyithuluzi elinamandla lakho kokubili izinga lebhizinisi kanye nezinhlelo zokusebenza zomuntu siqu. Ngenqwaba yezici namakhono okuqondisa izinqubo nokuphatha idatha ngempumelelo, i-Oracle ingumdlali onenkani emkhakheni we-IT. Naphezu kobunzima bayo obuningi, ukwazi ukuthi ungaxhumana kanjani nesizindalwazi sakho se-Oracle kubalulekile. Okunye ukusebenzisana okunjalo ukuhlonza igama lesizindalwazi sakho. Kungase kubonakale kuyinto encane, kodwa ukuqiniseka ukuthi usebenza nesizindalwazi esifanele kubalulekile ukuze uqinisekise ukuthi ukhohlisa isethi elungile yedatha. Kunezindlela ezimbalwa zokuhlola igama lakho lesizindalwazi se-Oracle, kodwa lesi sihloko sigxile kakhulu emibuzweni ye-SQL ngenxa yobulula nokusebenza kwayo.
Ku-Oracle, ukuthola igama lesizindalwazi sakho kulula ngombuzo olula we-SQL. Nakuba udinga ukwazi ukufinyelela iseva ye-Oracle njengomsebenzisi onezimvume ezifanele ukuze wenze imiyalo, ngokuvamile kuyinqubo eqondile yabantu abake babhekana nesizindalwazi se-Oracle ngaphambilini.
KHETHA igama
KUSUKA ku-v$database;
Ukusebenzisa isitatimende esingenhla kuzobuyisela igama lesizindalwazi se-Oracle esifinyelelwe njengamanje. Lo mbuzo we-SQL ukhetha inkambu 'yegama' kuthebula elibonakalayo elithi 'v$database' eliphethe ulwazi olubalulekile lwesizindalwazi.
Ngaphambi kokuthi uqale ukubhala imibuzo ye-SQL ku-Oracle, udinga kuqala ukuxhuma kusizindalwazi sakho se-Oracle. Lokhu kungenziwa ngonjiniyela we-Oracle SQL, SQL*Plus nanoma yiliphi elinye ithuluzi olithandayo. Ngemva kokuxhuma, ungaqalisa umbuzo we-SQL kumyalo womyalo we-SQL noma ngaphakathi kweskripthi sakho se-SQL.
Ukuqonda isizindalwazi se-v$
I-'v$database' iwukubuka kokusebenza okuguquguqukayo ku-Oracle. Iqukethe idatha emayelana nesizindalwazi ngokwaso hhayi mayelana ne-schema/amathebula ngaphakathi kuyo. Ukubuka kwe-'v$database' kuqukethe umugqa owodwa wolwazi mayelana nesizindalwazi. Inkambu 'yegama' esiyikhethile ngombuzo wethu we-SQL ingenye yezinkambu ezimbalwa kulokhu kubuka. Lokhu kubuka kuyasiza njengoba kukhombisa ulwazi olumayelana nesizindalwazi njengedethi yokudalwa kwayo, imodi yokungena, nezinye izilungiselelo ezihlukile zezinga lesizindalwazi.
Isebenzisa imiyalo ye-SQL ku-Oracle
I-Oracle inikeza izinketho ezimbalwa zokuqalisa imibuzo ye-SQL. I-SQL*Plus iyithuluzi elinikezwe i-Oracle ukuze isebenzise imiyalo ye-SQL ne-PL/SQL. Ungasebenzisa futhi i-Oracle SQL Developer, inguqulo eyisithombe ye-SQL*Plus engaphatha umthamo omkhulu wedatha kanye nabasebenzisi abaningi ngempumelelo. Lawa mathuluzi asiza ukuphatha imininingwane yakho egciniwe futhi ahlole kuqala idatha yakho, ngaphandle kokukuvumela ukuthi usebenzise imiyalo ye-SQL ne-PL/SQL.
Njengoba uhlolisisa kabanzi ohlelweni lwedathabheyisi ye-Oracle, uzobona ukuthi luguquguquka kangakanani futhi lungenziwa ngezifiso. Nakuba umbuzo oshiwo ngenhla we-SQL uyindlela elula yokunquma igama lakho lesizindalwazi, uhlelo olunamandla lwe-Oracle lukuvumela ukusebenzisana okuyinkimbinkimbi futhi okuklanyelwe uma ukudinga. Emhlabeni okhula njalo we-IT, ukugcina ugxilile kumakhono akho okuphatha imininingo egciniwe kubalulekile, futhi umnikelo we-Oracle's SQL iyithuluzi elinamandla kunqolobane yakho.
