Malangizo Omwe Mungapange Kugwira Ntchito ndi Zambiri Zosavuta
Deta yolongedwera mu mawonekedwe ena akhoza kuonedwa kuti ndi deta. Pali zambiri zomwe zimagwiritsidwa ntchito pazithunzithunzi ndipo zimagwiritsidwa ntchito pafupifupi pafupifupi pulogalamu iliyonse ndi ntchito yomwe imasungira kapena imapeza zambiri.
Ngati mutangoyamba ndi mazenera, m'munsimu muli phokoso la zinthu zapamwamba muyenera kuzidziwa musanayambe kupita patsogolo. Izi zikutsimikiziridwa kuti zikhale zosavuta kugwira ntchito ndi zolemba ndikuwonjezera zokolola.
01 ya 05
SQL Yakhazikitsa Zomwe Zina Zogwirizana
Simungathe kuzipewa: Language Structure Query imapanga maziko a zonse zolumikizana. Zimapereka mawonekedwe a uniform kwa Oracle, SQL Server, Microsoft Access, ndi mazenera ena oyanjana, ndipo ndi "ayenera kuphunzira" kwa onse ofunafuna deta.
Tengani maphunziro oyambirira a SQL musanayese kuphunzira pulogalamu iliyonse yachinsinsi. Nthaŵi yoperekera ndalama idzakuthandizani kumanga maziko abwino ndikuyamba kumapazi olondola padziko lonse lapansi.
W3Schools.com ndi malo oyambira oyamba kumene akufuna SQL. Zambiri "
02 ya 05
Kusankha Maziko Oyambirira Ndi Kusankha Kwambiri Kwambiri
Kusankhidwa kwa chinsinsi chachikulu ndi chimodzi mwa zisankho zovuta kwambiri zomwe mungapangitse popanga ndondomeko yatsopano. Chinthu chofunika kwambiri ndi chakuti muyenera kuonetsetsa kuti chinsinsi chosankhidwa n'chosiyana.
Ngati zingatheke kuti mbiri (yapitalo, ino, kapena tsogolo) ikhoza kukhala ndi phindu lofanana ndi lingaliro, ndiko kusankha kosayenera kwa makiyi oyambirira. Mukamayesa zovutazi, muyenera kulingalira mwachidwi.
Muyeneranso kupeŵa mfundo zowonongeka zomwe zimapangitsa nkhawa zaumwini, monga Social Security Numeri.
Kuti mudziwe zambiri pa kusankha chinsinsi cholimba, onani Kusankha Mutu Waukulu .
03 a 05
NULL Si Zero kapena String String
NULL ndi yamtengo wapatali kwambiri padziko lonse lapansi, koma ndizoyambira zomwe zimayamba kusokoneza.
Mukawona mtengo wa NULL, tanthauzani ngati "osadziwika." Ngati kuchuluka ndi NULL, izo sizikutanthauza kuti zero. Mofananamo, ngati gawo lamanja likugwira mtengo wa NULL , sizikutanthauza kuti palibe mtengo woyenera - ndizosadziwika.
Mwachitsanzo, taganizirani deta yomwe ili ndi zambiri zokhudza ana omwe amapita kusukulu. Ngati munthu akulowa m'kaundula sakudziwa zaka za wophunzira, mtengo wa NULL umagwiritsidwa ntchito kusonyeza malo osadziwika. Wophunzirayo ali ndi zaka zakubadwa - sizingathekepo mndandanda.
04 ya 05
Kutembenuza Zadataboti ku Zida Zopulumutsa Nthawi
Ngati muli ndi matani opezeka mu Microsoft Excel kapena mawonekedwe ena a spreadsheet, mungathe kudzipulumutsa mapiri a nthawi mwa kusintha ma spreadsheets awo ku matebulo a masamba.
Werengani phunziro lathu pa Kutembenuza ma Exreadsheets kwa Mauthenga Obwino kuti muyambe.
05 ya 05
Zopanga Zonse Zachidwi SINALENGEDWE ZOYENERA
Pali zida zambiri zosiyana kunja komwe, zomwe zimapereka zosiyanasiyana zosiyana pazigawo zosiyanasiyana za mtengo.
Zina ndizomwe zimakhala ndi zolemba zambiri zomwe zimakonzedwa kuti zikhale ndi malo osungiramo zinthu zopezeka m'mayiko osiyanasiyana. Zina ndi mazenera apamwamba omwe amayenera kutsatira kufufuza kwa sitolo yaying'ono ndi ogwiritsa ntchito imodzi kapena awiri.
Zofuna za bizinesi yanu zidzakonza malo oyenera a deta yanu pa zosowa zanu. Onani Database Software Options kuti mudziwe zambiri, komanso mndandanda wa Creators Best Online Online Database .