Primary key in Trainer_Info table is: Trainer_id
Primary key in Module_Info table is: Module_id.
4. NOT NULL field in Trainer_Info table is: Trainer_id
NOT NULL field in Module_Info table is: Module_id.
5. List out all the fields with specification/Data Type as INT :
In Trainer_info table : Module_Duration.
In Module_Info table: Trainer_Experience.
6. Identify all the fields with unique constraint:
In Trainer_info table: Trainer_id and Trainer_Emai is constraints.
In Module_info table :Module_id is constraints.

1. Necessary steps to implement 1NF :
The First normal form (1NF) sets basic rules for an organized database −
• Define the data items required, because they become the columns in a table.
• Place the related data items in a table.
• Ensure that there are no repeating groups of data.
• Ensure that there is a primary key.
2. Necessary steps to implement 2NF:
• The second step in Normalization is 2NF.
• A table is in 2NF, only if a relation is in 1NF and meet all the rules, and every non-key attribute 
is fully dependent on primary key.
• The Second Normal Form eliminates partial dependencies on primary keys.
3. Necessary steps to implement 3NF:
A table is in a third normal form when the following conditions are met −
• It is in second normal form.
• All nonprimary fields are dependent on the primary key.