Amathiphu Okumele Uyenze Ukusebenzisana Nezibalo Ezilula
Idatha ehleliwe kwifomethi ethile ingabhekwa njengedatha. Kunezinhlelo zokusebenza eziningi zezinqolobane ezigciniwe futhi zisetshenziselwa cishe zonke izinhlelo nezinkonzo ezigcina noma zithola ulwazi.
Uma usanda kuqalisa ngolwazi, ngezansi kukhona i-rundown yezinto eziphezulu okudingeka wazi ngaphambi kokuhamba phambili. La maqiniso aqinisekisiwe ukwenza kube lula ukusebenza ngama-database futhi ukwandise umkhiqizo.
01 ka 05
I-SQL Yakha I-core of Database Relatives
Awukwazi ukuyigwema: uLimi Oluhlelekile Lokwenza Ulimi luyisisekelo sokwaziswa konke okuhlobene. Inikeza isikhombimsebenzisi somfaniswano ku-Oracle, SQL Server, i-Microsoft Access, nakweminye imininingwane yolwazi oluhlobene, futhi "kufanele ufunde" kubo bonke abasebenzisi bezintandokazi ezifunayo.
Thatha inkambo yokuqala ye-SQL ngaphambi kokuthi uzame nokufunda noma iyiphi isofthiwe ethile yedatha. Isikhathi sokutshalwa kwezimali sizokusiza ukwakha isisekelo esifanele futhi uqale ngezinyawo ezifanele emhlabeni jikelele yolwazi.
I-W3Schools.com iyindawo enhle yokuqala yabaqalayo abanentshisekelo ku-SQL. Okuningi "
02 ka 05
Ukukhetha Amakhidi Eyinhloko Yisinqumo Esibaluleke Kakhulu
Ukukhethwa kwesihluthulelo esiyinhloko kungenye yezinqumo ezibaluleke kunazo zonke ozokwenza ekwakhiweni kwedatha entsha. Into ebaluleke kunazo zonke ukuthi kumele uqinisekise ukuthi ukhiye okhethiwe uhlukile.
Uma kungenzeka ukuthi amarekhodi amabili (esidlule, okwamanje, noma okuzayo) angase abe nesilinganiso esifanayo semfanelo, kuyisinqumo esibi sokhiye oyinhloko. Uma uhlola le nkinga, kufanele ucabange ngobuciko.
Uzodinga futhi ukugwema amagugu azwelayo aphakamisa ukukhathazeka kwangasese, njengezinombolo zokuphepha kwezenhlalakahle.
Ukuze uthole olunye ulwazi ngokukhetha ukhiye oyinhloko oyinhloko, bheka Ukukhetha Ukhiye Oyinhloko .
03 ka 05
I-NULL ayiyona i-Zero noma i-String engenalutho
I-NULL iyigugu elikhethekile kakhulu emhlabeni wezinqolobane, kodwa kukhona okuqala ukuthi abaqalayo badideke.
Uma ubona inani le-NULL, lihumushe ngokuthi "aliziwa." Uma ubungakanani bungu-NULL, lokho akusho ukuthi kungcono. Ngokufanayo, uma insimu yombhalo ibamba inani le-NULL , akusho ukuthi ayikho inani elifanele - livele lingaziwa.
Isibonelo, cabangela i-database equkethe ulwazi mayelana nezingane eziya esikoleni esithile. Uma umuntu ofaka irekhodi engazi iminyaka yobufundi, inani le-NULL lisetshenziselwa ukukhombisa "indawo engaziwa". Ngokuqinisekile umfundi uneminyaka yobudala - akukhona nje ku-database.
04 ka 05
Ukuguqula amaspredishithi ku-yolwazi Isikhathi Sokusindisa
Uma usuvele unamathani emininingwane egcinwe kwi-Microsoft Excel noma enye ifomethi yespredishithi, ungagcina izintaba zesikhathi ngokuguqula lawo maspredishithi kumatafula egciniwe.
Funda isifundo sethu ku-Converting Excel Spreadsheets Ukufinyelela Ulwazi ukuze uqalise.
05 ka 05
Wonke ama-platform ayisisekelo awadalwa ngokulinganayo
Kunezincazelo eziningi ezihlukene laphaya, zonke ezihlinzeka ngezici ezihlukahlukene ezihlukile kumaphuzu amanani ahlukene.
Ezinye zigciniwe ezigciniwe zezinkampani ezenzelwe ukuphatha izindawo ezinkulu zokugcina idatha ezikhonza amabhizinisi angamazwe angaphandle. Amanye ama-database egciniwe okufanelekile ukulandelela isitolo esitolo esincane nomsebenzisi oyedwa noma ababili.
Izidingo zebhizinisi lakho zizokwenza ukuthi i-platform yendawo yedatha efanele izidingo zakho. Bheka Izinketho ze- Software Database ukuze uthole ulwazi oluthe xaxa, kanye nohlu lwethu lwe- Creators Database Online Free Online .