he Representing objects as Tables pattern How do you map an object to a record or relational database schema? e The Representing objects as Tables pattern
The Representing Objects as Tables pattern How do you map an object to a record or relational database schema? The Representing Objects as Tables pattern
Manufacturer MANUFACTURER TABLE Manufacturer name= Now&Zen name name cit city Mumbai Now &Zen Mumbai Celestial Shortening San Ramon
Manufacturer name city ... ... name city Now&Zen Mumbai MANUFACTURER TABLE : Manufacturer name = Now&Zen city = Mumbai Celestial Shortening San Ramon
UML Data Modeling Profile aggregate signifies a referential constraint: a ProductDescription row can t exist without a related Manufacturer row < Table 《aoe》 Manufacturer ProductDescription PK》OD:char(16) <PK> OlD: char(16) Name: varchar(100 Description: varchar (100) City: varchar (50) PK-primary key FK-foreign key <FK> Manu_ OID: char(16)
UML Data Modeling Profile «Table» ProductDescription «PK» OID : char(16) Description : varchar(100) ... «FK» Manu_OID : char(16) «Table» Manufacturer «PK» OID : char(16) Name : varchar(100) City : varchar(50) 1 * aggregate signifies a referential constraint: a ProductDescription row can't exist without a related Manufacturer row PK - primary key FK - foreign key
对关系的存储设计 将一对一关联映射到表。 两个需要存储的永久类,二者之间有一个一对一关联。 职员 与;一 办公室 职员号码 办公室名 名字 地点
对关系的存储设计