Ikesi le-sql uma likhethiwe
Izwe ledatha liyindawo enkulu futhi eyinkimbinkimbi, egcwele ulwazi olulindele ukuvubukulwa futhi luguqulwe lube imininingwane ebalulekile. Njengososayensi wedatha onesizinda ku-AI namarobhothi, bengilokhu ngimangazwa amandla e-SQL okuzulazula kule ndawo eyinkimbinkimbi. Ukwakhiwa okukodwa ngaphakathi kwe-SQL, isitatimende esithi CASE WHEN, kuhlale kungithakazelisa.
Empeleni, isitatimende esithi CASE WHEN sinikeza indlela enamandla yokucabanga okunemibandela ngaphakathi kwemibuzo yakho ye-SQL. Ikuvumela ukuthi uhlole izimo futhi ubuyisele amanani ahlukene ngokusekelwe kumphumela. Lokhu kuvumelana nezimo kubaluleke kakhulu lapho usebenza namasethi edatha ahlukahlukene kanye nesidingo sokukhipha ulwazi oluthile.
Kuyini Ikesi le-sql uma likhethiwe nethi Kungani Kubalulekile?
Empeleni, isitatimende esithi CASE WHEN sisebenza njengesimo sokuthi uma kungenjalo ezilimini zokuhlela. Uchaza isethi yemibandela futhi ucacise imiphumela ehambisanayo. Isibonelo, ungase uyisebenzisele ukuhlukanisa amakhasimende ngokwezigaba ngokusekelwe emlandweni wawo wokuthenga:
- Amakhasimende athenge okungaphezu kuka-10 ahlukaniswa ngokuthi “Inani Eliphezulu.”
- Amakhasimende athenge phakathi kuka-5 no-10 ahlukaniswa ngokuthi “Inani Elimaphakathi.”
- Amakhasimende athenge okungaphansi kokungu-5 ahlukaniswa ngokuthi “Inani Eliphansi.”
Lesi sakhiwo esibonakala silula sinemithelela ejulile. Ngokuhlanganisa CASE LAPHO izitatimende ngaphakathi kwezigatshana zakho KHETHA, ungakwazi:
- Thuthukisa ukuhlaziya idatha: Thola imininingwane emisha ngokudala izigaba zangokwezifiso namaqembu ngaphakathi kwedatha yakho.
- Thuthukisa ikhwalithi yedatha: Hlanza futhi uguqule idatha ngokuphatha amanani ashodayo, ukulungisa ukungqubuzana, nokusebenzisa izinguquko eziyinkimbinkimbi.
- Yenza imibuzo eyinkimbinkimbi ibe lula: Hlukanisa ukucabanga okuyinkimbinkimbi kube izinyathelo ezilawulekayo, wenze ikhodi yakho ye-SQL ifundeke kakhudlwana futhi inakekeleke.
- Yenza okuphumayo kube ngokwakho: Hlela imiphumela ibe nezidingo ezithile zomsebenzisi noma izintandokazi ngokushintsha ngokushintshayo okukhiphayo ngokusekelwe kumibandela ehlukahlukene.
Empeleni, isitatimende esithi CASE WHEN sikunikeza amandla okulolonga ukuhlaziya idatha yakho futhi uvule imininingwane ejulile engase ihlale ifihliwe.
Isimo Somhlaba Wangempela: Ukuguqula Ikesi le-sql uma likhethiwe Yempumelelo
Ake sicabangele isimo sokucatshangelwa esihlanganisa Abaphathi Abahlanganisiwe Iqembu AMG, ifemu ehamba phambili yokuphatha impahla. I-AMG iphethe iphothifoliyo ehlukahlukene yokutshalwa kwezimali kuzo zonke izigaba zempahla futhi ifuna ukuqonda iphrofayili yengozi yokutshalwa kwezimali ngakunye.
Ukuze kuzuzwe lokhu, i-AMG ingasebenzisa ISIMO LAPHO isitatimende esingaphakathi kwesigatshana sabo ESIKHETHA ukuze sihlukanise ukutshalwa kwezimali ngokwezigaba ngokusekelwe ekuguquguqukeni kwazo. Ngokwesibonelo:
- Ukutshalwa kwezimali okunokuchezuka okujwayelekile okukhulu kuno-20% kubhekwa “njengengozi Ephezulu.”
- Ukutshalwa kwezimali okunokuchezuka okujwayelekile phakathi kuka-10% no-20% kubhekwa “Njengengozi Emaphakathi.”
- Ukutshalwa kwezimali okunokuchezuka okujwayelekile okungaphansi kuka-10% kuhlukaniswa ngokuthi “Ubungozi obuncane.”
Ngokuhlanganisa lo mqondo emibuzweni yabo ye-SQL, i-AMG ingakwazi ukuhlonza ngokushesha nangokuphumelelayo ukutshalwa kwezimali okuyingozi enkulu, ibenze bakwazi ukwenza izinqumo ezinolwazi mayelana nokwabiwa kwephothifoliyo nokulawulwa kobungozi.
Lesi isibonelo esisodwa sendlela isitatimende esithi CASE WHEN singasetshenziswa kumongo womhlaba wangempela. Amathuba cishe awanamkhawulo, ahlanganisa izimboni nezizinda ezihlukahlukene. Kusukela ekuhlaziyweni kwezezimali nokuhlukaniswa kwekhasimende kuya ekutholeni ukukhwabanisa nocwaningo lwesayensi, isitatimende esithi CASE WHEN singaba ithuluzi elinamandla lokukhipha imininingwane enengqondo kudatha yakho.
Icala LAPHO isitatimende siyithuluzi elibalulekile kunoma yimuphi uchwepheshe wedatha. Ngokwazi ukusetshenziswa kwayo, ungakwazi ukuvula ileveli entsha yobunkimbinkimbi kumibuzo yakho ye-SQL futhi uthole ukuqonda okujulile kwedatha eshayela izinqumo zebhizinisi lakho.
Umshwana wokuzihlangula: Lokhu okuthunyelwe kwebhulogi kuhloselwe izinjongo zokwaziswa kuphela futhi akufanele kuthathwe njengeseluleko sezezimali noma sokutshalwa kwezimali. 1
