如何在SQL中實現ER圖中顯示的客戶和客戶表 [英]How can I implement the customer and Account table shown in ER diagram in SQL
如何不使用工具就僅憑數據為數據庫創建ER圖? [英]How can I create an ER diagram for a database from the data alone without using a tool?
在ER圖中,我們如何表示某種關系,例如某些球員是教練還是某些學生是老師 [英]In ER Diagram how can we represent a relation like some players are coaches or some students are teachers