Db Design: Junction table or column
1
I have three tables like below.
user company user_company
-------- ------- ------------------
id(pk) id(pk) user_id(pk, fk)
company_id(pk, fk)
My problem is: Each user and company, must have a unique customer number. And I want to connect these user and company tables to single table.
So, should I create junction tables for user and company?
customer user_customer company_customer
--------------- ------------------ ----------------
customer_no(pk) user_id(pk, fk) company_id(pk, fk)
customer_type customer_no(pk, fk) customer_no(pk, fk)
Or should I just add id column to customer table?
customer
---------------
customer_no(pk)
user_id(fk)
company_id(fk)
Which one is correct? Or, is there any other way to do this?
database-design
asked 7 mins ago
mnesimimnesimi
6
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add a comment |
1
I have three tables like below.
user company user_company
-------- ------- ------------------
id(pk) id(pk) user_id(pk, fk)
company_id(pk, fk)
My problem is: Each user and company, must have a unique customer number. And I want to connect these user and company tables to single table.
So, should I create junction tables for user and company?
customer user_customer company_customer
--------------- ------------------ ----------------
customer_no(pk) user_id(pk, fk) company_id(pk, fk)
customer_type customer_no(pk, fk) customer_no(pk, fk)
Or should I just add id column to customer table?
customer
---------------
customer_no(pk)
user_id(fk)
company_id(fk)
Which one is correct? Or, is there any other way to do this?
database-design
asked 7 mins ago
mnesimimnesimi
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago
add a comment |
1
1
1
I have three tables like below.
user company user_company
-------- ------- ------------------
id(pk) id(pk) user_id(pk, fk)
company_id(pk, fk)
My problem is: Each user and company, must have a unique customer number. And I want to connect these user and company tables to single table.
So, should I create junction tables for user and company?
customer user_customer company_customer
--------------- ------------------ ----------------
customer_no(pk) user_id(pk, fk) company_id(pk, fk)
customer_type customer_no(pk, fk) customer_no(pk, fk)
Or should I just add id column to customer table?
customer
---------------
customer_no(pk)
user_id(fk)
company_id(fk)
Which one is correct? Or, is there any other way to do this?
database-design
asked 7 mins ago
mnesimimnesimi
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have three tables like below.
user company user_company
-------- ------- ------------------
id(pk) id(pk) user_id(pk, fk)
company_id(pk, fk)
My problem is: Each user and company, must have a unique customer number. And I want to connect these user and company tables to single table.
So, should I create junction tables for user and company?
customer user_customer company_customer
--------------- ------------------ ----------------
customer_no(pk) user_id(pk, fk) company_id(pk, fk)
customer_type customer_no(pk, fk) customer_no(pk, fk)
Or should I just add id column to customer table?
customer
---------------
customer_no(pk)
user_id(fk)
company_id(fk)
Which one is correct? Or, is there any other way to do this?
database-design
database-design
asked 7 mins ago
mnesimimnesimi
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
mnesimimnesimi
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
mnesimimnesimi
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
mnesimimnesimi
6
asked 7 mins ago
mnesimimnesimi
6
6
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
mnesimi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago
add a comment |
I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago
I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago
I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago
add a comment |
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I'd keep it simple and just add the id to the customer table unless you have a very good reason not to.
– Mr.Brownstone
32 secs ago