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Exercises data modeling and entity relationship model
In software engineering, an Entity – Relationship model (ER model for short) is an abstract way to describe a database. It usually starts with a relational database, which stores data in tables. Some of the data in these tables point to data in other tables - for instance, your entry in the database could point to several entries for each of the phone numbers that are yours. The ER model would say that you are an entity, and each phone...
17 p dtu 23/10/2012 194 1
Từ khóa: Entity–relationship model, Exercises data modeling and entity relationship model, SQL Server, kỹ thuật dữ liệu, kỹ thuật máy tính, phần mềm máy tính