note

演示使用数据

• org
• user
• course

orgs

- org-1
	- user-super
		- course-a
- org-1.1
	- user-001
	- user-002
	- user-003
- org-2
	- user-admin
		- course-b
		- course-001
		- course-002
		- ...
		- course-012
- org-2.1
	- 

users

user-super	-> org1
user-admin	-> org2
user-001	-> org1.1
user-002	-> org1.1
user-003	-> org1.1
user-no-org	-> null
user-no-org2-> org-no-exist

courses

course-a		-> user-super		->		org1
course-b		-> user-admin		->		org2
course-001~012	-> user-admin		->		org1
course-013~015	-> user-no-org		->		NULL

demo data

- org-1
	- user-super
		- course-a
- org-1.1
	- user-001
	- user-002
	- user-003
- org-2
	- user-admin
		- course-b
		- course-001
		- course-002
		- ...
		- course-012
- org-2.1
	- 

org's user count

• org1.1: 3
• org1: 1
• org2: 1
• org1.2: 0

user's course count

• user-admin: 13
• user-no-org: 3
• user-super: 1
• user-001: 0
• user-002: 0
• user-003: 0

org's course count

• org2: 13
• org1: 1
• org1.1: 0
• org1.2: 0