Emhlabeni wolwazi kanye nokukhohlisa kwedatha, izitembu zesikhathi zibalulekile. Banikeza irekhodi elinembile lokudalwa kwedatha noma ukuguqulwa kusizindalwazi. Ku-SQL, ngokuvamile kuyadingeka ukusetha inani lesitembu sesikhathi esimisiwe ukuze libe isitembu sesikhathi samanje. Lokhu kuba usizo ikakhulukazi ezimweni lapho sidinga ukulandelela isikhathi okwenzeka ngaso umcimbi othile noma kunoma isiphi isimo, lapho kudingeka khona isikhathi esimisiwe. Lesi sihloko sizocacisa lesi sici sohlelo lwe-SQL.
MySQL
Kuxazululiwe: i-group_concat ehlukile
I-group_concat ihlukile kuwumsebenzi onamandla ku-SQL, okuvumela ukuthi uhlanganise amanani amaningi ukusuka eqenjini lemigqa ube yiyunithi yezinhlamvu eyodwa, ehlukanisiwe. Imibuzo kusizindalwazi ngokuvamile idinga ukuthi uthole imiphumela ehlukile, futhi i-group_concat ehlukile ikusiza ukuthi uzuze lokho ngendlela efomethwe ngobunono. Inkinga evamile onjiniyela abaningi abahlangabezana nayo ukuthola inani elilodwa eqenjini lamanani noma ukuhlanganisa wonke amanani ahlukile abe yikholomu eyodwa ukuze kube lula ukubhekisela.
Ixazululiwe: faka i-mysql raspberry pi
Ukufaka i-MySQL ku-Raspberry Pi kuyinqubo ebalulekile, ikakhulukazi uma unethemba lokusebenzisa i-Pi yakho njengeseva noma ukuphatha idatha nesizindalwazi. Kungase kuzwakale njengentambo eyinkimbinkimbi ukuhamba ekuqaleni, kodwa ngokusebenza ngokucophelela kwesinyathelo ngesinyathelo, kungafezwa kalula. Le ndatshana izokuqondisa ngenqubo yokufaka i-SQL ku-Raspberry Pi futhi izochaza ukusebenza kwemitapo yolwazi edingekayo namakhodi ukuze ukwazi ukufaka kahle.
Kuxazululiwe: misa inqubomgomo yephasiwedi
Izinqubomgomo zephasiwedi zidlala indima ebalulekile ekuqinisekiseni ukuvikeleka kwedatha yomsebenzisi, okuhlanganisa ukuvimbela ukufinyelela okungagunyaziwe nokuvikela ulwazi olubucayi. Ukuphoqelela inqubomgomo yephasiwedi eqinile kubalulekile ukuze kugcinwe ubuqotho, ukugcinwa kuyimfihlo, kanye nokutholakala kwedatha egcinwe kusistimu yolwazi. Kodwa-ke, ukuphatha kanye nokuphoqelela izinqubomgomo zephasiwedi kwesinye isikhathi kungaletha inselele. Lesi sihloko sethula isisombululo senkinga ngombono wokuthuthukiswa kwe-SQL, sinikeza umhlahlandlela wesinyathelo ngesinyathelo sendlela yokuphatha nokuphoqelela inqubomgomo yephasiwedi kanye nekhodi ye-SQL edingekayo ehilelekile. Ngaphezu kwalokho, sizongena sijule emisebenzini ebalulekile ye-SQL namalabhulali ahlobene nokuphathwa kwenqubomgomo yamaphasiwedi.
Kuxazululiwe: shintsha iphasiwedi yomsebenzisi
Impela, sicela uthole indatshana echazwe ngezansi:
Ukushintsha iphasiwedi yomsebenzisi ku-SQL kuwumsebenzi ovamile wabalawuli besistimu nabathuthukisi ngokufanayo. Kubalulekile ukuvuselela njalo nokuqinisa izinyathelo zokuphepha ezivikela idatha yomsebenzisi, enye yazo ehlanganisa ukubuyekezwa njalo kwamaphasiwedi. Izikripthi ze-SQL zinikeza ikhono lokusingatha le misebenzi ngempumelelo.
Ixazululiwe: yenza i-mysql workbench
Impela, ngizokunikeza isifinyezo sesihloko.
I-MySQL Workbench iyithuluzi elibumbene elibukwayo labakhi besizindalwazi, abathuthukisi, nama-DBA. Ihlinzeka ngemodeli yedatha, ukuthuthukiswa kwe-SQL, namathuluzi okuphatha aphelele wokucushwa kweseva, ukuphathwa komsebenzisi, ikhophi yasenqolobaneni, nokunye okuningi.
Ukufaka i-MySQL Workbench ohlelweni lwakho ngezinye izikhathi kungaba inselele, ikakhulukazi uma ungaqeqeshekile kahle ekusebenziseni umugqa womyalo noma ukuphela. Kodwa, ngosizo lwe-Homebrew - uhlelo lokuphatha iphakheji yesofthiwe yomthombo ovulekile - inqubo iba lula kakhulu.
Ixazululiwe: khipha i-mysql kubuntu
Ikhipha i-MySQL ku-Ubuntu kungaba umsebenzi obalulekile uma ufuna ukufaka inguqulo entsha, susa ukufakwa kwe-MySQL okonakele, noma vele ukhulule ezinye izinsiza zesistimu. Ukwazi ukuthi ungakwenza kanjani lokhu ngokunembile nangempumelelo kukusindisa usizi olukhulu futhi kuqinisekisa ukuthi awekho amafayela asele angaphazamisa ukufakwa kwesikhathi esizayo.
Kuxazululiwe: mysql_secure_installation
MySQL ime njengomunye wezinhlelo zokuphatha isizindalwazi ezinamandla kakhulu nezidumile. Isebenza njengesisekelo sezinhlelo zokusebenza eziningi ezisekelwe kuwebhu, ngenxa yemvelo yayo yomthombo ovulekile kanye nokuhambisana nezilimi ezihlukahlukene zokuhlela. Isici esibalulekile sokusebenza ne-MySQL sibandakanya ukufakwa kwayo okuphephile, okunesihloko 'mysql_secure_installation'. Lesi skripthi sivumela isendlalelo esiphezulu sokuvikela, esihlinzeka ngendlela yokususwa kwabasebenzisi abangaziwa, ukungena ngemvume kwezimpande, nezingosi zolwazi zokuhlola, kuncishiswe ukuxhashazwa okungase kube khona kubasebenzisi abakhohlakele.
Kuxazululiwe: bonisa okuguquguqukayo
Kubalulekile ukuqonda ukuthi usetshenziswa kanjani umyalo othi “SHOW VARIABLES” ku-SQL njengoba ungasinikeza ingcebo yolwazi mayelana nokucushwa kweseva yethu ye-MySQL. Lo myalo oguquguqukayo unikeza indlela enamandla yokuthi siqinisekise futhi silungise okuguquguqukayo okungathinta ukusebenza nomsebenzi wemisebenzi yethu.
Ukuphatha okuguquguqukayo ngokuphumelelayo kungathuthukisa kakhulu ukusebenza kahle kokuphathwa kwedatha yethu futhi, ekugcineni, kuholele ekuphumeni okungcono nokulawula okuqinile phezu kweseva yethu ye-SQL.