A. 網上書店系統ER圖怎麼畫
狹義的系統er圖是database的對應關系圖，
先把書店系統的db設計好，各個db之間怎麼關聯，怎麼關聯想清楚，就成了er圖
B. 求一張在線論壇系統的ER圖（急）
我給你一個圖，但是我懶得用visio畫了，都是重復工作，很容易畫的，再說畫出來貼到網路上也要變成非矢量圖了，已經失去visio圖的意義了
C. 什麼叫ER圖，什麼叫系統流程圖！請具體講清楚
er是實體關系圖，關系資料庫設計時用的，系統流程圖就是軟體的邏輯流程，先干什麼後干什麼，兩個根本不是一個東西
D. 網上購書系統ER圖
The ER Model of the Bookseller System
Entities:
Customer: Username, Password, Age, Sex, Salary, Speciality, Address(Street, City, Postcode), E-mail, Tel, Mobilephone, FavType;
VIPUser: Username, Totalprice, Discount;
NormalUser: Username, Totalprice, Discount;
Book: BookID, Bookname, Author{Name(Fname, MI, Lname)}, ISBN(_________), Year, Pub, Type, Price, Discount, Number;
Stock: BookID, Number;
Oos: BookID, Number;
BookType: TypeID, Type, Nmuber;
Relationships:
Sell: <Customer, Book>, M:N, PARTIAL/PARTIAL, SNoBook(Sno, Username, BookID), Number, Price, Totalprice, WayofSend, FixDate, SendDate, GetDate;
Has: <Book, BookType>, N:1, TOTAL/PARTIAL;
Some Assumptions/Clarifications:
• Not all customers necessarily buy books. Not all books are necessarily sold.
• Not all booktypes need necessarily be of books. However, all books must have a booktype and only one booktype.
• If there is no book with a particular name, the book will be in the out of stock set. The others are in the stock set.
• The customer who has paid over 200 Yuan will be in the VIP set. The others are in the normal set.
圖傳不上去……
E. 我要做一個購物網站的畢設，誰會畫ER圖嗎幫我畫下謝謝
把你自己的內容構思寫點出來嘛···什麼類型的商品?
F. 購書管理系統ER圖怎麼設計
在網上找個ER設計軟體! 最好是中文版的! 自己做一個! 應該不是很難!
G. 超市管理系統er圖怎麼畫啊
可以具體一點嗎？知道工廠系統erp