1. demand analysis: analyze the requirements of the recruitment management system in detail. Including system functions, performance, security and other requirements.
2. Conceptual structure design: design the conceptual structure of the database according to the results of demand analysis. Draw ER diagram and describe the relationship between entities in detail.
3. Logical structure design: the conceptual structure is transformed into a relational model and optimized. Determine the primary key and foreign key of tables, and define the relationship between tables.