10-ER model

实体

方框表示

flowchart LR 
	id[实体名称]

实体属性

flowchart LR 
	id(实体属性)

实体之间的联系

flowchart LR 
	id{实体联系}

Example

多对多关系

flowchart LR 
	stu_id(学号)
	stu_name[学生姓名]
	stu_gentle(学生性别)
	shouke{授课}
	teacher[老师]
	stu_id --- stu_name
	stu_name --- stu_gentle
	stu_name -- n --- shouke
	shouke -- m --- teacher

erDiagram
    CAR ||--o{ NAMED-DRIVER : allows
    CAR {
        string registrationNumber
        string make
        string model
    }
    PERSON ||--o{ NAMED-DRIVER : is
    PERSON {
        string firstName
        string lastName
        int age
    }