Figuer:
-Assuming that we do not use the rule(s)that avoid null values in tables in converting the ERD diagram to a relational database,the number of attributes in the primary key of the table SUBCOMMITTEE is:
A) 3
B) 4
C) 5
D) 6

Question

Figuer: 
-Assuming that we do not use the rule(s)that avoid null values in tables in converting the ERD diagram to a relational database,the number of attributes in the primary key of the table SUBCOMMITTEE is:
A) 3 
B) 4 
C) 5 
D) 6

Quizplus · Accepted Answer

The primary key of the SUBCOMMITTEE table in a relational database derived from an ERD diagram typically consists of its own unique identifier plus the foreign keys needed to ensure its relationships with other entities. Without specific rules to avoid null values and assuming a standard normalization process, the primary key would likely include the SUBCOMMITTEE's unique ID, and the IDs of entities it directly relates to, such as COMMITTEE and possibly MEMBER entities. However, without detailed ERD specifics, the most common scenario would involve the SUBCOMMITTEE ID and the IDs of entities it must relate to directly, typically resulting in 3 attributes (SUBCOMMITTEE ID, COMMITTEE ID, and possibly a MEMBER ID if members are directly associated with subcommittees in a many-to-many relationship). This assumes a basic structure without additional context provided.

Figuer: -Assuming That We Do Not Use the Rule(s)that Avoid Null