1. How can database design effectively handle and represent One-to-Many relationships between tables?

In order to effectively handle and represent One-to-Many relationships between tables in a database, you can follow these steps:

1. Identify the Entities: The first step in designing a database is to identify the entities. Entities are the main objects or subjects in the system being modeled. For example, in a school database, the entities might be Students, Teachers, and Courses.

2. Identify the Relationships: The next step is to identify the relationships between these entities. In a One-to-Many relationship, one record in a table can be associated with one or more records in another table. For example, one Teacher can teach many Courses, but each Course is taught by only one Teacher.

3. Create a Primary Key: Each table in a database should have a primary key. A primary key is a unique identifier for a record in the table. For example, each Teacher might have a unique Teacher ID.

4. Create a Foreign Key: To represent a One-to-Many relationship, you can create a foreign key in the 'many' table that references the primary key of the 'one' table. For example, the Courses table might have a Teacher ID field that is a foreign key referencing the Teacher table. This means that each Course record is associated with one Teacher record.

5. Normalize the Database: Finally, you should normalize the database to eliminate redundancy and ensure data integrity. Normalization involves organizing the tables and relationships between them to reduce redundancy and dependency.

By following these steps, you can effectively handle and represent One-to-Many relationships in a database.