After you have developed and designed your ERD you are ready for the next step, which is turning your ERD into a functioning database. The first step for this is establishing your requirements and resources for research if needed. Then you create a table for each entity. The attributes for the entity become your columns for/of the tables. Then the identifier of the entity becomes your primary key for/of the table. You must remember to define any and all data types, null status, default values, and data constraints.