Explain the di?erence between ODMG relationships and E-R relationships.
What will be an ideal response?
The ODMG term “relationship” clashes with the use of this term in the E-R model. ODMG relationships and attributes are quite similar, except that relationships point to objects instead of values. In contrast, E-R relationships are similar to objects. They have their own structure, which is represented using attributes and roles. In fact, the notion of a role in E-R corresponds to the ODMG notion of relationship, because roles are essentially attributes that point to entities (instead of primitive types like integers and strings).
You might also like to view...
Case-Based Critical Thinking QuestionsCase 1Amitabh is in training to move from his position as a programmer for the company to a role as your assistant database administrator. In your first meeting, you are introducing him to the options for opening an Access database. Amitabh needs a given database to allow multiple users to open and use the database at the same time. What mode do you advise Amitabh to use?
A. Open B. Open Read-Only C. Open Exclusive D. Open Exclusive Read-Only
Write a Perl program that stores URL information into a database using Win32::ODBC. The first field of the database should contain an actual URL and the second should contain a description of that URL.
What will be an ideal response?
What are the two most likely causes for Windows 7 -based devices to frequently disconnect from a newly installed home wireless network? (Select two.)
A) Interference from other devices B) Faulty AP C) Incorrect SSID D) Incorrect security settings E) Faulty wireless antenna F) Incorrectly configured DHCP settings
If you wanted to schedule a meeting, you would use mind-mapping software.
Answer the following statement true (T) or false (F)