Karteikarten
Info 210 Midterm Studdy
Karten in diesem Stapel (8)
- 1What is this relationship?One to Many (1:M) As In one instructor cant have many courses
- 2What is this relationshipMany to many relationship
- 3What is this relationship (Employee manages store)One to One As in One employ
- 4Data AbstrationThe process of hiding irrelevant details from user is called data abstraction.
- 5Data Abstraction LevelsPhysical level: This is the lowest level of data abstraction. It describes how data is actually stored in database. You can get the complex data structure details at this level.
Logical level: This is the middle level of 3-level data abstraction architecture. It describes what data is stored in database.
View level: Highest level of data abstraction. This level describes the user interaction with database system. - 6What is this relationship?One Mandatory to Many Optional
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