What is the Degree of a Relationship Type with example?

What are the differences between the following: Domains, Attributes, Tuples, and Relations?

What is the different between role name and recursive relationship?

List and explain any 4 types of attributes? With drawing if needed

What are the types of Ratio constraints (constraints on relationship)

Define the meaning of constraint and list the three main categories of constraints

Explain the three main types of constraints in details?

hand drawing : Draw ER diagram COURSE SYSTEM. For each relationship set, specify structural constraints (cardinality ratio and participation constraints).

1. For each Student, the portal maintains student ID, Name, E-mail. Each student has a unique ID. Name is consist of Fname, Midname, and Lname.
2. Each COURSE is described by a Course Code, Description, Category, and Term. Both Course Code and Term have unique values for each course.
3. Each Teacher has a Teacher ID, Name and Phone number. The value of ID is unique for each teacher.