Zotsatizana Zotsatizana Zomwe Zili Zokha Zokha Zizindikiro Ziyenera Kulowetsa mu Database
Database Consistency imanena kuti deta yolondola yokha ndiyolembedwera ku deta. Ngati ntchito ikugwiritsidwa ntchito yomwe imaphwanya malamulo a mgwirizanowu, ntchito yonseyo idzagwedezeka ndipo deta idzabwezeretsedwanso ku chikhalidwe chake choyambirira. Kumbali ina, ngati ntchitoyo ikugwirizanitsa bwino, idzatenga deta kuchokera ku dziko limodzi lomwe likugwirizana ndi malamulo ku dziko lina lomwe likugwirizananso ndi malamulo.
Kusungidwa kosasinthika sikukutanthawuza kuti malondawo ndi olondola, kokha kuti malondawo sanaphwanye malamulo omwe akufotokozedwa ndi pulogalamuyi. Kusungika kwazinthu zofunikira kumakhala kofunika chifukwa zimayendetsa deta yomwe ikubwera ndikukana deta yomwe sichigwirizana ndi malamulo.
Chitsanzo cha Malamulo Otsutsana Pa Ntchito
Mwachitsanzo, chithunzi m'datala chingakhale ndi ndalama zokhazokha ngati "mitu" kapena "mchira." Ngati wogwiritsa ntchito amayesa kuika "pambali," malamulo osagwirizana a database sakanalola.
Mukhoza kukhala ndi chidziwitso ndi malamulo osasinthasintha potsalira munda mu mawonekedwe a tsamba la webusaiti opanda kanthu. Pamene munthu akudzaza fomu pa intaneti ndikuiwala kuti adze malo amodzi oyenera, mtengo wa NULL umapita ku databases, ndikupangitsa fomu kukanidwa mpaka malo opanda kanthu ali nawo.
Kusagwirizana ndi gawo lachiwiri la chitsanzo cha ACID (Atomicity, Consistency, Isolation, Durability), yomwe ndi ndondomeko yotsimikizirika kuti zowonongeka za ma database ndi zolondola.