存储多个用户属性集合的最佳方法

Question

Question about best db design practices for the following scenario:

I have a user table which stores information like password, the department user belongs to, Email etc I also have to create another table to store user access information. I have users with access as following:

1. userid 123 : [line of business: abc, xyz,etc], [Role: Team leader, Regular User etc], [Company: 1234, 54666, etc]
2. userid 345: [line of business: abc, xyz, 987, etc], [Role: Team leader, Maintenance etc], [Company: 1234, 54666, etc]

Basically, a user can have any combinations of different access for each of these categories.

The way i was thinking is in this table, create 3 columns for each type of access and store each category in the form of xml, otherwise i have to create 3 different tables for each categories, t_user_Lob, t_user_role, t_user_company.

what is the best way to do this?

I also thought about storing them as csv values in each column but i heard that it's goes against the relational normalization rules.

I also like json way to storing data but i am using sql server 2012 and it's hell to parse/compare values in json columns in 2012.

Thanks

Answer 1

I would store them in three separate tables.

Your question isn't clear about what relationships are needed, but basically you use three tables to create a many-to-many relationship.

Entity A
Entity B
Relationship (A - B)

Answer 2

Assuming the combinatorics aren't outlandish, I would create a table, call it user_access, with every combination of role and company and give each row a unique value. Then create a third table, call it user_access_people with a user ID and an associated user_access value. So user_access_people would have your many to many relationship between user_id and user_access_Id. It would have multiple rows per each user_ID when necessary.

You can then join these tables to check for whatever value from the user_access columns that you are looking for.