source

source

• https://beginnersbook.com/2015/04/dbms-tutorial/

• https://www.tutorialspoint.com/dbms/index.htm

diagram

• https://www.smartdraw.com/entity-relationship-diagram/

• https://www.lucidchart.com/pages/er-diagrams

resource

• Schema design tips

designer

• sqldbm
• quora tips
• Schema-designer

paid

• schema.io