Gwiritsani ntchito zithunzi za ER kuti muwonetse ubale pakati pa mabungwe a database
Chithunzi chogwirizana cha mgwirizano ndi mawonekedwe apadera omwe amasonyeza mgwirizano pakati pa mabungwe omwe ali mu database . Mithunzi ya ER nthawi zambiri amagwiritsa ntchito zizindikiro kuimira mitundu itatu ya chidziwitso: mabungwe (kapena mfundo), maubwenzi ndi zikhumbo. Mu makampani ofanana ma chithunzi cha ER, mabokosi amagwiritsidwa ntchito kuimira zinthu. Ma diamondi amagwiritsidwa ntchito kuimira maubwenzi, ndipo ovals amagwiritsidwa ntchito kuimira makhalidwe.
Ngakhale kwa diso losaphunzitsidwa, maubwenzi a mgwirizano angayang'ane mosavuta, kwa owona bwino, amathandiza ogwiritsa ntchito malonda kumvetsetsa zigawo zosungiramo zinthu zapamwamba pamlingo wapamwamba popanda kutsagana ndi tsatanetsatane.
Anthu ogwiritsa ntchito makina ogwiritsa ntchito makina amatha kugwiritsa ntchito zithunzi za ER kuti agwiritse ntchito maubwenzi pakati pa mabungwe a deta ndi mawonekedwe omveka bwino. Mapulogalamu ambiri a mapulogalamu ali ndi njira zokha zopangira zithunzi za ER kuchokera kumasamba omwe alipo.
Taganizirani chitsanzo cha deta yomwe ili ndi zidziwitso za anthu okhala mumzinda. Chithunzi cha ER chomwe chikuwonetsedwa muchithunzi chotsatira nkhaniyi chili ndi zigawo ziwiri: Munthu ndi Mzinda. Ubale umodzi wokhala ndi "moyo" umagwirizanitsa awiriwo pamodzi. Munthu aliyense amakhala mumzinda umodzi wokha, koma mzinda uliwonse ukhoza kumanga anthu ambiri. Mu chithunzichi, zikhumbo ndi dzina la munthu ndi chiwerengero cha mzindawo. Kawirikawiri, maina amagwiritsidwa ntchito pofotokozera zida ndi zikhumbo, pamene mazenera amagwiritsidwa ntchito pofotokoza maubwenzi.
Mipingo
Chinthu chilichonse chimene mumayang'ana mu deta ndi chinthu, ndipo gulu lirilonse liri tebulo mu deta yolumikizana. Kawirikawiri, gulu lirilonse m'databata limafanana ndi mzere. Ngati muli ndi database yomwe ili ndi mayina a anthu, bungwe lake likhoza kutchedwa "Munthu." Gome lomwe liri ndi dzina lomwelo likanakhalapo mu deta, ndipo munthu aliyense adzapatsidwa mzere mu tebulo la Munthu.
Zizindikiro
Mauthenga ali ndi chidziwitso chokhudza chilichonse. Chidziwitso ichi chimatchedwa "zikhumbo." ndipo ili ndi chidziwitso chodabwitsa pa gulu lirilonse. Mu chitsanzo cha Munthu, zikhumbo zingakhale ndi dzina loyamba, dzina lomaliza, kubadwa ndi chiwerengero chodziwika. Zizindikiro zimapereka zambiri zokhudzana ndi gulu. M'ndondomeko yachidule, zikhumbo zimagwiritsidwa ntchito kumalo kumene zowonjezera zowonongedwa zikuchitika. Inu simuli owerengeka pa chiwerengero china cha zikhumbo.
Ubale
Mtengo wa chigwirizano cha mgwirizano wa gululi uli ndi mphamvu yake yosonyezera chidziwitso cha maubwenzi pakati pa mabungwe. Mu chitsanzo chathu, mutha kudziwa zambiri zokhudza mzinda umene munthu aliyense amakhala. Mukhozanso kufufuza zambiri zokhudza mudzi wokhawo mumzinda wodalirika ndi chiyanjano chomwe chimagwirizanitsa anthu ndi mudzi wa chidziwitso.
Mmene Mungapangire Chithunzi CHA ER
- Pangani bokosi pa chinthu chirichonse kapena mfundo yoyenera mu chitsanzo chanu.
- Dulani mizere kuti mugwirizanitse zipangizo zofanana kuti muwonetsere maubwenzi. Lembani maubwenzi pogwiritsa ntchito ziganizo mkati mwa ma diamondi.
- Dziwani ziyeneretso zofunikira pa gulu lirilonse, kuyambira ndi zikhumbo zofunika kwambiri, ndi kuzilowetsa muzithunzi. Pambuyo pake, mungathe kupanga malingaliro anu mndandanda wambiri.
Mukadzatsiriza, mudzakhala mukuwonetseratu kuti malingaliro a malonda akusiyana bwanji ndi wina ndi mzake, ndipo mudzakhala ndi maziko oyenerera kupanga deta yolumikizana ndikuthandizira bizinesi yanu.