classDiagram
class Animal {
+String name
+int age
+makeSound()
+move()
}
class Dog {
+String breed
+bark()
+wagTail()
}
class Cat {
+boolean indoor
+meow()
+purr()
}
Animal <|-- Dog
Animal <|-- Cat
饼图 (Pie Chart)
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pie title 编程语言使用比例
"JavaScript" : 35
"Python" : 25
"Java" : 20
"Go" : 10
"其他" : 10
erDiagram
USER ||--o{ ORDER : places
USER {
int id
string name
string email
}
ORDER ||--|{ LINE-ITEM : contains
ORDER {
int id
date order_date
int user_id
}
LINE-ITEM {
int id
int quantity
int product_id
int order_id
}
PRODUCT ||--o{ LINE-ITEM : "ordered in"
PRODUCT {
int id
string name
decimal price
}