Define some naming convention in database. Avoid confuse name in lots of table or column.

1. Naming Convention
in Database
Davis Chen

2. Agenda
•Global Naming Convention
•Table
•Column
•Constraint

3. Naming Conventions
+
Consistency
II
Best Practice

4. Global Naming Convention
• UPPERCASE / lowercase / camelCase /
PascalCamelCase
• Separate with underscore (order_detail)
• Singular / Plural (company not companys)
• Same term for same meaning
• Prefix & Postfix
• Do not use number (1st ,type_4_address,user_2_role)
• Comment

5. Table
• Relationship
◆user_role , user has many role
◆employee_address , employee has an address
• PK
◆Use id in all table / {table}_id
◆Avoid composite key
• Use Same Term (account / accounting / accounts)

6. Column
• Same term !!!
◆status,state,code,info,version,checkd ...
◆created_at,updated_at,deleted_at
◆created_user_id,upXXX...,deleXXX...
◆type,category,classification,kind ...
• FK
◆{ref_id} -> user ref company , use company_id

7. Constraint
• pk_{table}
• fk_{table}_ref_{ref_table}
◆fk_employee_ref_address
• uq_{table}_{column}
• ix_{table}_{column}
• {table}_seq
• tr_{table}_bi(before insert)_XXX

8. Q & A
~~ Thanks for your listening ~~