In the context of database tables, what is a Child Class?

• A. A record that is unique to its class
• B. A table that serves as a base for other tables
• C. A table that extends another and inherits its fields
• D. A class that does not interact with other tables

Answer: (C)

A Child Class in the context of database tables refers specifically to a table that extends another table and inherits its fields. This relationship is foundational in object-oriented database design, where you can create a hierarchy of tables. The Child Class takes on all the attributes of the Parent Class (also known as the Base Class) while also having the ability to have its own unique fields and attributes. This structure promotes reusability and organization within the database, allowing for better maintenance and structure of data.

By using a Child Class, you can create specialized tables based on a broader category, enhancing the capability to differentiate and manage data effectively. For example, if you have a Parent Class for 'Users', a Child Class might be 'Admin Users', which would inherit all the properties of 'Users' but could also include additional fields specific to admin functionalities. Thus, option C accurately captures this concept of extending and inheriting properties from another class, forming a key aspect of the hierarchical structure in ServiceNow's table relationships.